What phrase became McDonald's global advertising slogan in 2003?

“I'm Lovin' It” became McDonald's global advertising slogan in 2003.

McDonald's introduced the campaign in 2003 as part of an effort to create a more unified international brand message. The phrase was paired with a distinctive musical hook and was adapted for use in many markets and languages while retaining the recognizable English wording in global advertising.

The slogan is sometimes confused with earlier McDonald's campaigns such as “You Deserve a Break Today,” which dates from the 1970s. Those earlier lines belonged to different advertising eras, whereas “I'm Lovin' It” became the long-running platform associated with the modern brand.

The campaign also illustrates how McDonald's branding moved beyond product descriptions. Instead of focusing only on speed or value, the wording expressed an emotional reaction to the experience. Its short, conversational style made it easy to repeat, translate, sing, and connect with the company's visual identity.