Which McDonald’s slogan debuted worldwide in 2003?

McDonald’s slogan “I’m Lovin’ It” debuted worldwide in 2003.

The campaign was introduced internationally in September 2003 and became one of McDonald’s longest-running global branding platforms. Its casual first-person wording was designed to sound like a consumer’s personal expression rather than a formal advertising claim.

The campaign used the “ba da ba ba ba” musical hook and appeared across television, radio, packaging, restaurants, and other media. McDonald’s adapted the advertising for different countries while retaining the central English-language phrase.

“I’m Lovin’ It” is often confused with earlier McDonald’s slogans such as “You Deserve a Break Today,” which belonged to a different advertising era. The 2003 campaign marked a major shift toward globally consistent branding.