What was the name of the agency behind McDonald's global “I'm Lovin' It” campaign?

Heye & Partner was the agency behind McDonald's global “I'm Lovin' It” campaign.

The campaign began in 2003 and was developed by the German advertising agency Heye & Partner. McDonald's adopted the phrase as a global marketing platform, making it one of the company's most widely recognized slogans. The wording was deliberately conversational and designed to work across markets and media.

The campaign is also associated with a jingle recorded in multiple versions, including a version connected with Justin Timberlake. That musical association often causes people to identify the performer rather than the advertising agency when recalling the campaign's origins.

DDB Worldwide and Leo Burnett have also worked on major McDonald's advertising, which can create confusion about agency attribution. For the specific global launch of “I'm Lovin' It,” the agency credited with developing the campaign was Heye & Partner.