What classic song supplied the melody for McDonald's 1986 Mac Tonight campaign?

McDonald's based the Mac Tonight campaign on the song “Mack the Knife.”

The advertising used a rewritten version of the song associated with Bobby Darin's successful 1959 recording. McDonald's changed the lyrics to promote nighttime dining, while retaining the recognizable melody and swing-influenced feel.

The musical choice helped make the campaign stand out. Its moon-faced mascot, tuxedo styling, and altered song all worked together to present McDonald's as a place to visit after dark. The campaign began in 1986 and became one of the company's most distinctive pieces of late-twentieth-century advertising.

The song is often misremembered as “Moon River” because of the moon imagery in the commercials. The character's visual theme was lunar, but the campaign's musical source was “Mack the Knife.”