Mac Tonight was the moon-faced singer used in McDonald's late-1980s advertising.
Mac Tonight appeared in a campaign that promoted McDonald's evening business. The character wore formal clothing, sunglasses, and a crescent-moon head while singing a rewritten version of the song “Mack the Knife.” The campaign made nighttime visits a distinct part of the restaurant's marketing.
Mac Tonight is often confused with Ronald McDonald because both were major advertising characters, but they served different purposes. Ronald was the long-running family mascot, while Mac Tonight was a separate, campaign-specific figure focused on dinner and late-evening branding.
The character became especially recognizable because of the contrast between the moon-shaped head and the lounge-singer presentation. Mac Tonight was much less enduring than Ronald, yet remains a notable example of McDonald's using a strongly themed character to reposition a daypart.