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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 11-K
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               [x] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

                      For the year ended December 31, 2003

                                       or

        [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934


               For the transition period from ________ to ________


                           Commission File No. 0-25642
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            A. Full title of the plan and the address of the plan, if
                 different from that of the issuer named below:

                    COMMONWEALTH INDUSTRIES, INC. 401(K) PLAN
           AND COMMONWEALTH ALUMINUM LEWISPORT, LLC HOURLY 401(K) PLAN
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  B. Name of issuer of securities held pursuant to the plan and the address of
                         its principal executive office:

                          COMMONWEALTH INDUSTRIES, INC.
                            500 West Jefferson Street
                             PNC Plaza - 19th Floor
                         Louisville, Kentucky 40202-2823

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                                    FORM 11-K
                    Commonwealth Industries, Inc. 401(k) Plan
           and Commonwealth Aluminum Lewisport, LLC Hourly 401(k) Plan
                                December 31, 2003



The following financial statements and supplemental schedule of the Plans filed
as exhibits to this Form 11-K are incorporated herein by reference and submitted
in paper format on Form SE:

         Financial Statements:

              Statements of Net Assets Available for Benefits as of
                  December 31, 2003 and 2002

              Statements of Changes in Net Assets Available for Benefits for the
                  years ended December 31, 2003 and 2002

              Notes to Financial Statements

         Supplemental Schedule:

              Schedule H, Line 4i - Schedule of Assets (Held at End of Year),
                  December 31, 2003


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Signature Page                                                    3

Exhibit Index                                                     4


                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Benefits Committee of Commonwealth Industries, Inc. has duly caused this annual
report to be signed on its behalf by the undersigned thereunto duly authorized.


               Commonwealth Industries, Inc. 401(k) Plan
               and Commonwealth Aluminum Lewisport, LLC
               Hourly 401(k) Plan

               By:      /s/ Henry Del Castillo
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                        Henry Del Castillo
                        Vice President Finance
                        Commonwealth Industries, Inc. and a
                        member of the Benefits Committee

Date:    June  28, 2004


                                  Exhibit Index
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Exhibit
Number                     Description
- -------                    -----------
    13.1* Financial statements and supplemental schedule of the Commonwealth
Industries, Inc. 401(k) Plan as of December 31, 2003 and 2002, and for the years
ended December 31, 2003 and 2002, including report of independent registered
public accounting firm.

    13.2* Financial statements and supplemental schedule of the Commonwealth
Aluminum Lewisport, LLC Hourly 401(k) Plan as of December 31, 2003 and 2002, and
for the years ended December 31, 2003 and 2002, including report of independent
registered public accounting firm.

    23.1  Consent of PricewaterhouseCoopers LLP

    23.2  Consent of PricewaterhouseCoopers LLP

* Exhibits 13.1 and 13.2 above are submitted in paper format on Form SE.