What 2003 McDonald’s slogan was created by the advertising agency Heye & Partner?

“I’m Lovin’ It” was the 2003 McDonald’s slogan created through work by the German advertising agency Heye & Partner.

McDonald’s launched the campaign internationally in 2003, making it one of the company’s most widely used global branding platforms. The phrase was paired with a distinctive musical hook and the “i’m lovin’ it” wordmark, usually presented in lowercase. Its informal wording was intended to sound conversational and adaptable across languages and markets.

The campaign is sometimes linked only with the performer Justin Timberlake, who appeared in the launch advertising, or with the producer and songwriter Pharrell Williams. Those contributors were involved in the campaign’s music, but Heye & Partner is the agency associated with developing the slogan and campaign concept.

The slogan was not McDonald’s first global advertising line. Earlier campaigns were often more strongly tied to U.S. television advertising. “I’m Lovin’ It” became notable for its international rollout and long-term use across multiple forms of McDonald’s marketing.