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


                                FORM 8-K

                             CURRENT REPORT
                     Pursuant to Section 13 or 15(d)
                 of the Securities Exchange Act of 1934


            Date of Report (Date of earliest event reported):
                           September 24, 2003

                               VIACOM INC.
                ----------------------------------------

                       (Exact name of registrant as
                        specified in its charter)


           Delaware                   001-09553                04-2949533
    ----------------------         ----------------        -----------------
 State or other jurisdiction          Commission              IRS Employer
       of incorporation              File Number         Identification Number



                    1515 Broadway, New York, NY 10036
                    ---------------------------------

           (Address of principal executive offices) (Zip Code)


                            (212) 258-6000
                            --------------
          (Registrant's telephone number, including area code)


Item 7. Financial Statements and Exhibits (c) Exhibits Exhibit 99 - Press release dated September 24, 2003 issued by the Registrant. Item 9. Regulation FD Disclosure On September 24, 2003, the Registrant issued a press release announcing that it was updating its business outlook for 2003. A copy of such press release is attached hereto as Exhibit 99 and is incorporated by reference herein in its entirety.

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. VIACOM INC. (Registrant) By: /s/ Michael D. Fricklas ------------------------------------- Michael D. Fricklas Executive Vice President, General Counsel and Secretary Date: September 24, 2003

Exhibit Index 99 Press release dated September 24, 2003 issued by the Registrant.

                    VIACOM UPDATES BUSINESS OUTLOOK FOR 2003


New York, New York, September 24, 2003 - Viacom Inc. (NYSE: VIA, VIA.B)
announced today that it is updating its full year 2003 business outlook.

Viacom said that while the economic recovery has translated into robust national
advertising sales growth, the pace of recovery in local advertising markets
going into the fourth quarter is not as rapid as had been anticipated. The
Company said it now expects to deliver mid- to high-single digit growth in
revenues and operating income for the full year, versus its earlier guidance of
high single-digit growth for revenues and double-digit growth for operating
income. In addition, Viacom now expects to deliver low- to mid-teen growth in
net earnings (before cumulative effect of change in accounting principle) and
earnings per share for full year 2003, versus its earlier guidance of mid-teen
growth.

Viacom continues to expect a record year for revenues, operating income, net
earnings (before cumulative effect of change in accounting principle) and
earnings per share in 2003, as well as strong growth for 2004. The Company is
extremely well-positioned to reap the benefits of an expected improvement in
local advertising markets in 2004, driven by an improving economy, political
advertising, and the Super Bowl on CBS.

Viacom is a leading global media company, with preeminent positions in broadcast
and cable television, radio, outdoor advertising, and online. With programming
that appeals to audiences in every demographic category across virtually all
media, the Company is a leader in the creation, promotion, and distribution of
entertainment, news, sports, music, and comedy. Viacom's well-known brands
include CBS, MTV, Nickelodeon, VH1, BET, Paramount Pictures, Viacom Outdoor,
Infinity Broadcasting, UPN, Spike TV, TV Land, CMT: Country Music Television,
Comedy Central, Showtime, Blockbuster, and Simon & Schuster. More information
about Viacom and its businesses is available at www.viacom.com.

                             - more -

- 2 - Cautionary Statement Concerning Forward-looking Statements This news release contains both historical and forward-looking statements. All statements, other than statements of historical fact are, or may be deemed to be, forward-looking statements within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Exchange Act of 1934. These forward-looking statements are not based on historical facts, but rather reflect the Company's current expectations concerning future results and events. Similarly, statements that describe our objectives, plans or goals are or may be forward-looking statements. These forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be different from any future results, performance and achievements expressed or implied by these statements. The following important factors, among others, could affect future results, causing these results to differ materially from those expressed in our forward-looking statements: advertising market conditions generally, and, in particular, in local markets; changes in the public acceptance of the Company's programming and, in particular, performance of motion pictures to be released in the fourth quarter and television programming; changes in technology and its effect on competition in the Company's markets; changes in the Federal Communications laws and regulations; the impact of piracy on the Company's products; other domestic and global economic, business, competitive and/or regulatory factors affecting the Company's businesses generally, including, among other things geopolitical risks; and other factors described in the Company's previous news releases and filings made by the Company with the Securities and Exchange Commission including but not limited to the Company's Form 10-Q for the periods ended March 31, 2003 and June 30, 2003 and the Company's Form 10-K for the period ended December 31, 2002. The forward-looking statements included in this document are made only as of the date of this document and under section 27A of the Securities Act and section 21E of the Exchange Act, we do not have any obligation to publicly update any forward-looking statements to reflect subsequent events or circumstances. ### Contacts: Media: Investors: - ------ --------- Carl D. Folta Marty Shea 212-258-6352 212-258-6515 Susan Duffy Jim Bombassei 212-258-6347 212-258-6377