Which phrase became McDonald's first major international advertising slogan in 2003?

“I'm Lovin' It” became McDonald's first major international advertising slogan in 2003.

The campaign represented an effort to coordinate McDonald's branding across markets while still allowing local advertising and language adaptations. A short, informal phrase could be translated or localized more easily than a long product-focused message, helping the company present a more consistent global identity.

The campaign is often discussed alongside its music because Justin Timberlake performed the associated song. The musical element supported the advertising, but the slogan itself was the phrase that became the enduring brand line.

Earlier McDonald's slogans were highly memorable but were generally associated with particular campaigns or periods. “I'm Lovin' It” was distinctive for its intended international reach and its emphasis on a personal, upbeat reaction to the brand. That combination helped it become one of McDonald's longest-running modern slogans.