McDonald's first international advertising campaign built around its 2003 slogan was called "I'm lovin' it."
The campaign launched in 2003 and used the phrase, the lowercase styling, and a distinctive five-note musical signature across markets. It was McDonald's first global advertising campaign, replacing a series of slogans that had been used more selectively in different countries.
The English phrase was adapted or translated for local audiences, but the central identity remained consistent. The campaign helped McDonald's present a younger, more contemporary brand image while connecting television, radio, outdoor advertising, and later digital marketing.
The slogan is often confused with earlier McDonald's lines such as "You Deserve a Break Today," which debuted in the 1970s. The earlier slogan was important in American advertising history, but "I'm lovin' it" became the chain's long-running global platform.