Prospectus Supplement                           Filed Pursuant to Rule 424(b)(3)
(To Prospectus dated October 12, 2000)             Registration Number 333-44960


                                  $805,000,000

                         Diamond Offshore Drilling, Inc.

               Zero Coupon Convertible Debentures Due June 6, 2020

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

           This prospectus supplement relates to the resale by the holders of
our Zero Coupon Convertible Debentures Due June 6, 2020 and the shares of our
common stock issuable upon the conversion of the debentures.

           This prospectus supplement should be read in conjunction with, and
may not be delivered or utilized without, the prospectus dated October 12, 2000.
The terms of the debentures are set forth in the prospectus.

           The information in the table appearing under the heading "Selling
Securityholders" in the prospectus is amended by adding the information below
with respect to persons not previously listed in the prospectus and by
supplementing the information with respect to other persons previously listed in
the prospectus that are listed below.



                                                          PRINCIPAL AMOUNT AT
                                                         MATURITY OF DEBENTURES        PERCENTAGE OF      NUMBER OF CONVERSION
                                                           BENEFICIALLY OWNED            DEBENTURES            SHARES THAT
NAME (1)                                                    THAT MAY BE SOLD            OUTSTANDING          MAY BE SOLD (2)
- --------                                                    ----------------            -----------          ---------------
                                                                                                
MFS Total Return Fund, a series of Trust V ...........       $    4,000,000                 0.50%                  34,430




- --------------------------
(1)  Information concerning other selling holders of Debentures will be set
     forth in prospectus supplements from time to time, if required.

(2)  The conversion shares do not total 6,929,038 shares due to rounding
     resulting from the elimination of fractional shares.


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

            The date of this prospectus supplement is July 14, 2003.