Exhibit 99.1

Contact: Randall Weisenburger
212-415-3393

FOR IMMEDIATE RELEASE

NEW YORK, APRIL 29, 2003 - Omnicom Group Inc. (NYSE-OMC) today announced that net income for the first quarter of 2003 increased marginally to $128.6 million compared with the first quarter of 2002 and diluted earnings per share for the first quarter of 2003 increased to $0.69 per share from $0.68 per share in the first quarter of 2002.

Worldwide revenue increased 12% to $1,937.2 million from $1,732.4 million in the first quarter of 2002. Domestic revenue for the first quarter of 2003 increased 8% to $1,099.6 million compared to $1,022.1 million in 2002. International revenue increased 18% to $837.6 million compared to $710.3 million last year.

Omnicom Group Inc. (NYSE-OMC) (www.omnicomgroup.com), is a leading global marketing and corporate communications company. Omnicom’s branded networks and numerous specialty firms provide advertising, strategic media planning and buying, direct and promotional marketing, public relations and other specialty communications services to over 5,000 clients in more than 100 countries.

For a live webcast and/or a replay of our first quarter earnings conference call, go to www.omnicomgroup.com/InvestorRelations.

Omnicom Group Inc.

(Unaudited)
(In Thousands of Dollars, Except Per Share Data)

Three Months Ended March 31	2003		2002
Revenue	$ 1,937,245		$ 1,732,426
Operating and net interest expense	1,722,159		1,514,890
Income before income taxes	215,086		217,536
Income taxes	75,211		79,858
Income after income taxes	139,875		137,678
Equity in affiliates / Minority interests	(11,291	)	(9,112	)
Net income	$    128,584		$    128,566
Earnings per share
Basic	$          0.69		$          0.69
Diluted	$          0.69		$          0.68
Weighted average shares (in thousands)
Basic	186,556		186,671
Diluted (a)	187,329		189,490
Dividend declared per share	$          0.20		$          0.20

(a) Diluted earnings per share for 2003 and 2002 was calculated using an assumed increase in net income of $240,000 and $271,000 respectively, related to the after-tax compensation expense from dividends on restricted shares.