What advertising slogan did McDonald's introduce in 2003 and use worldwide?

McDonald’s introduced the worldwide advertising slogan “I’m Lovin’ It” in 2003.

The campaign marked a major effort to give McDonald’s a more unified international brand voice. Its wording was deliberately conversational and upbeat, presenting the restaurant as part of customers’ everyday enjoyment rather than focusing only on speed, price, or product features.

The campaign used the phrase in advertising, packaging, restaurant materials, and music. The associated jingle became especially recognizable, helping the slogan work across markets even when advertisements were adapted into different languages.

McDonald’s had used several famous slogans before 2003, including “You Deserve a Break Today” and “We Love to See You Smile.” “I’m Lovin’ It” became the company’s enduring global platform. The apostrophe in “I’m” and the informal “Lovin’” are part of the established wording, so versions with more formal grammar are not the official slogan.