What slogan did McDonald’s launch globally in 2003 as its signature brand message?

McDonald’s launched “I’m lovin’ it” globally in 2003 as its signature brand message.

The campaign was introduced as a major international marketing platform rather than as a short-lived local advertisement. Its lowercase styling and conversational wording were designed to sound informal, positive, and easy to translate across markets. McDonald’s used the phrase in television commercials, print advertising, packaging, music, and restaurant materials.

The campaign became closely associated with a distinctive five-note musical signature and with advertising featuring the singer Justin Timberlake. The branding was developed through the advertising agency Heye & Partner, part of the DDB network. Different countries adapted the advertising while retaining the central phrase or its local-language equivalent.

“I’m lovin’ it” followed earlier McDonald’s slogans such as “You Deserve a Break Today” and “Did Somebody Say McDonald’s?” Those earlier campaigns are sometimes confused with the current global platform, but the 2003 campaign established the phrase that became the company’s long-running international tagline.