Filed pursuant to Rule 424(b)(3)
                                                     Registration No. 333-106293


                           PROSPECTUS SUPPLEMENT NO. 4
                       (TO PROSPECTUS DATED JULY 3, 2003)

                                U.S. $889,000,000

                              CARNIVAL CORPORATION

                     SENIOR CONVERTIBLE DEBENTURES DUE 2033
                         GUARANTEED BY CARNIVAL PLC AND
                   P&O PRINCESS CRUISES INTERNATIONAL LIMITED

         This prospectus supplement No. 4 supplements and amends the prospectus
dated July 3, 2003, as amended and supplemented by prospectus supplement No. 1
dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003 and
prospectus supplement No. 3 dated August 25, 2003 relating to $889,000,000
aggregate principal amount at maturity of our Senior Convertible Debentures due
2033 (the "debentures") and 20,896,657 shares of our common stock issuable upon
conversion of the debentures held by the selling securityholders, plus an
indeterminate number of shares as may become issuable upon conversion of the
debentures by reason of adjustment to the conversion price.

         The table on page 74 of the prospectus sets forth information with
respect to the selling securityholders and the respective amounts at maturity of
debentures beneficially owned by each selling securityholder that may be offered
pursuant to the prospectus, as amended and supplemented by prospectus supplement
No. 1 dated July 21, 2003, prospectus supplement No. 2 dated August 8, 2003 and
prospectus supplement No. 3 dated August 25, 2003. This prospectus supplement
amends that table by adding to it the items set forth below.



------------------------------------------------------------------------------------------------------------------------
                                       PRINCIPAL AMOUNT                     NUMBER OF SHARES OF
                                        AT MATURITY OF       PERCENT OF         COMMON STOCK       NUMBER OF SHARES OF
                                          DEBENTURES           TOTAL           ISSUABLE UPON       COMMON STOCK OWNED
            SELLING                      BENEFICIALLY       OUTSTANDING      INITIAL CONVERSION    PRIOR TO CONVERSION
        SECURITYHOLDER                OWNED AND OFFERED      DEBENTURES      OF DEBENTURES (1)      OF DEBENTURES (1)
------------------------------------------------------------------------------------------------------------------------
                                                                                       

Banc of America Securities L.L.C....        $2,100,000             0.24%            49,362                   0
------------------------------------------------------------------------------------------------------------------------

Bear, Stearns & Co., Inc............       $30,500,000             3.43%           716,927                   0
------------------------------------------------------------------------------------------------------------------------

Laurel Ridge Capital, LP............        $7,500,000             0.84%           176,294                   0
------------------------------------------------------------------------------------------------------------------------

White River Securities L.L.C........       $30,500,000             3.43%           716,927                   0
------------------------------------------------------------------------------------------------------------------------


(1)  Also includes an equivalent number of non-detachable trust shares of
     beneficial interest in P&O Princess Special Voting Trust, a trust
     established under the laws of the Cayman Islands. See "Description of Trust
     Shares."




         The prospectus dated July 3, 2003, as amended and supplemented by
prospectus supplement No. 1 dated July 21, 2003, prospectus supplement No. 2
dated August 8, 2003, prospectus supplement No. 3 dated August 25, 2003 and this
prospectus supplement No. 4 constitutes the prospectus required to be delivered
by Section 5(b) of the Securities Act of 1933, as amended, with respect to
offers and sales of the debentures and the common stock issuable upon conversion
of the debentures.

         Our common stock is traded on the New York Stock Exchange under the
symbol "CCL." On September 10, 2003, the last reported sales price of the common
stock was $33.41 per share.

         There is no public market for the debentures, and we do not intend to
apply for their listing on any securities exchange or seek approval for
quotation of them through any automated system.

         INVESTING IN THE SECURITIES OFFER BY THIS PROSPECTUS INVOLVES RISKS
THAT ARE DESCRIBED IN THE "RISK FACTORS" SECTION BEGINNING ON PAGE 11 OF THE
ACCOMPANYING PROSPECTUS.

         Neither the Securities and Exchange Commission, nor any state
securities commission has approved or disapproved of the securities offered by
this prospectus or passed upon the adequacy or accuracy of this prospectus
supplement. Any representation to the contrary is a criminal offense.


                          -----------------------------

          The date of this prospectus supplement is September 11, 2003.





                             SELLING SECURITYHOLDERS

         The prospectus dated July 3, 2003, as amended and supplemented by
prospectus supplement No. 1 dated July 21, 2003, prospectus supplement No. 2
dated August 8, 2003, and prospectus supplement No. 3 dated August 25, 2003
relating to the offer for resale of $889,000,000 aggregate principal amount at
maturity of debentures and 20,896,657 shares of our common stock issuable upon
conversion of the debentures held by the selling securityholders, plus an
indeterminate number of shares as may become issuable upon conversion of the
debentures by reason of adjustment to the conversion price and, upon each
issuance of shares of Carnival Corporation common stock to a person, including
to a holder of debentures upon conversion of debentures, an equivalent number of
non-detachable trust shares of beneficial interest in the P&O Princess Special
Voting Trust, is amended to replace the first paragraph and the table under the
heading "Selling Securityholders" on page 74 with the information in the
following paragraph and table. We may further amend or supplement this table
from time to time if necessary.

         We originally sold the debentures to the initial purchaser in a private
placement. The debentures were subsequently resold by the initial purchaser to
purchasers, including the selling securityholders listed below, in transactions
exempt from registration. The following table provides, as of September 11,
2003, the principal amount at maturity of debentures held by such selling
securityholder, the number of shares of common stock beneficially owned by such
securityholder prior to its conversion of any debentures and the number of
shares of our common stock issuable upon conversion of the debentures. This
information has been obtained from the selling securityholders.



------------------------------------------------------------------------------------------------------------------------

                                       PRINCIPAL AMOUNT                     NUMBER OF SHARES OF
                                        AT MATURITY OF       PERCENT OF         COMMON STOCK       NUMBER OF SHARES OF
                                          DEBENTURES           TOTAL           ISSUABLE UPON       COMMON STOCK OWNED
            SELLING                      BENEFICIALLY       OUTSTANDING      INITIAL CONVERSION    PRIOR TO CONVERSION
        SECURITYHOLDER                OWNED AND OFFERED      DEBENTURES      OF DEBENTURES (1)      OF DEBENTURES (1)
------------------------------------------------------------------------------------------------------------------------
                                                                                       
Argent Classic Convertible
Arbitrage (Bermuda) Fund Ltd......        $6,600,000             0.74%           155,138                      0
------------------------------------------------------------------------------------------------------------------------

Argent Classic Convertible
Arbitrage Fund L.P................        $2,800,000             0.31%            65,816                      0
------------------------------------------------------------------------------------------------------------------------

Argent LowLev Convertible
Arbitrage Fund LLC................        $1,100,000             0.12%            25,856                      0
------------------------------------------------------------------------------------------------------------------------

Argent LowLev Convertible
Arbitrage Fund Ltd................        $6,300,000             0.71%           148,087                      0
------------------------------------------------------------------------------------------------------------------------

Banc of America Securities L.L.C..        $2,100,000             0.24%            49,362                      0
------------------------------------------------------------------------------------------------------------------------

Bank Austria Cayman Islands, LTD..        $7,650,000             0.86%           179,819                      0
------------------------------------------------------------------------------------------------------------------------

Bear, Stearns & Co., Inc..........       $30,500,000             3.43%           716,927                      0
------------------------------------------------------------------------------------------------------------------------

BNP Paribas Equity Strategies
SNC...............................          $744,000             0.08%            17,488                      0
------------------------------------------------------------------------------------------------------------------------

Clinton Convertible Managed
Trading Account 1 Limited.........        $2,620,000             0.29%            61,585                      0
------------------------------------------------------------------------------------------------------------------------

Clinton Multistrategy Master
Fund, Ltd.........................       $21,890,000             2.46%           514,542                      0
------------------------------------------------------------------------------------------------------------------------

Clinton Riverside Convertible
Portfolio Limited.................       $22,000,000             2.47%           517,128                      0
------------------------------------------------------------------------------------------------------------------------

Continental Assurance Company
On Behalf Of Its Separate
Account  (E)......................        $3,100,000             0.35%            72,868                      0
------------------------------------------------------------------------------------------------------------------------

Continental Casualty Company......       $24,400,000             2.74%           573,542                      0
------------------------------------------------------------------------------------------------------------------------

CooperNeff Convertible
Strategies (Cayman) Master
Fund L.P..........................          $580,000             0.07%            13,633                      0
------------------------------------------------------------------------------------------------------------------------

DBAG London.......................          $500,000              .06%            11,753                      0
------------------------------------------------------------------------------------------------------------------------

Global Bermuda Limited
Partnership.......................       $23,100,000             2.60%           542,984                      0
------------------------------------------------------------------------------------------------------------------------

Goldman, Sachs & Co...............       $48,400,000             5.44%         1,137,681                      0
------------------------------------------------------------------------------------------------------------------------

Guggenheim Portfolio Co. XV, LLC..        $1,350,000             0.15%            31,733                      0
------------------------------------------------------------------------------------------------------------------------

Hamilton Multi-Strategy Master
Fund, LP..........................        $4,300,000             0.48%           101,075                      0
------------------------------------------------------------------------------------------------------------------------

Highbridge International LLC......       $50,000,000             5.62%         1,175,290                      0
------------------------------------------------------------------------------------------------------------------------

KBC Financial Products (Cayman
Islands) Ltd......................        $5,500,000             0.62%           129,282                      0
------------------------------------------------------------------------------------------------------------------------

KBC Financial Products USA Inc....        $1,450,000             0.16%            34,083                      0
------------------------------------------------------------------------------------------------------------------------

Lakeshore International, Ltd......       $92,400,000            10.40%         2,171,936                      0
------------------------------------------------------------------------------------------------------------------------

Laurel Ridge Capital, LP..........        $7,500,000             0.84%           176,294                      0
------------------------------------------------------------------------------------------------------------------------

Lyxor Master Fund.................        $2,100,000             0.24%            49,362                      0
------------------------------------------------------------------------------------------------------------------------

Meadow IAM Limited ...............        $2,090,000             0.24%            49,127                      0
------------------------------------------------------------------------------------------------------------------------

Merrill, Lynch, Pierce, Fenner
& Smith, Inc......................       $92,750,000            10.43%         2,180,163                      0
------------------------------------------------------------------------------------------------------------------------

Nomura Securities
International, Inc................       $15,000,000             1.69%           352,587                658,452
------------------------------------------------------------------------------------------------------------------------

Ramius Capital Group..............          $900,000             0.10%            21,155                      0
------------------------------------------------------------------------------------------------------------------------

Ramius, LP........................          $270,000             0.03%             6,347                      0
------------------------------------------------------------------------------------------------------------------------

Ramius Master Fund, LTD...........       $10,823,000             1.22%           254,403                      0
------------------------------------------------------------------------------------------------------------------------

Ramius Partners II, LP............          $315,000             0.04%             7,404                      0
------------------------------------------------------------------------------------------------------------------------

RCG Baldwin, LP...................        $1,125,000             0.13%            26,444                      0
------------------------------------------------------------------------------------------------------------------------

RCG Halifax Master Fund, LTD......        $1,125,000             0.13%            26,444                      0
------------------------------------------------------------------------------------------------------------------------

RCG Latitude Master Fund, LTD.....       $10,822,000             1.22%           254,380                      0
------------------------------------------------------------------------------------------------------------------------

RCG Multi Strategy Master
Fund, LTD.........................          $720,000             0.08%            16,924                      0
------------------------------------------------------------------------------------------------------------------------

S.A.C. Capital Associates,
LLC...............................          $500,000             0.06%            11,753                  7,500
------------------------------------------------------------------------------------------------------------------------

Sagamore Hill Hub Fund LTD........       $35,600,000             4.00%           836,806                      0
------------------------------------------------------------------------------------------------------------------------

Singlehedge US Convertible
Arbitrage Fund ...................           $71,000             0.01%             1,669                      0
------------------------------------------------------------------------------------------------------------------------

Sturgeon Limited..................          $105,000             0.01%             2,468                      0
------------------------------------------------------------------------------------------------------------------------

Swiss Re Financial Products
Corporation.......................       $47,000,000             5.29%         1,104,773                      0
------------------------------------------------------------------------------------------------------------------------

The Coast Fund, LP................       $21,100,000             2.37%           495,972                      0
------------------------------------------------------------------------------------------------------------------------

UBS AG London Branch..............      $115,000,000            12.94%         2,703,167                      0
------------------------------------------------------------------------------------------------------------------------

White River Securities L.L.C......       $30,500,000             3.43%           716,927                      0
------------------------------------------------------------------------------------------------------------------------

Xavex Convertible Arbitrage #5....          $900,000             0.10%            21,155                      0
------------------------------------------------------------------------------------------------------------------------

Xavex Risk Arbitrage Fund 2.......          $400,000             0.04%             9,402                      0
------------------------------------------------------------------------------------------------------------------------

Zurich Institutional Benchmark
Master Fund LTD...................          $300,000             0.03%             7,052                      0
------------------------------------------------------------------------------------------------------------------------


(1)  Also includes an equivalent number of non-detachable trust shares of
     beneficial interest in P&O Princess Special Voting Trust, a trust
     established under the laws of the Cayman Islands. See "Description of Trust
     Shares."