Mac Tonight is a fictional character who was used in marketing for McDonald's restaurants in the late 1980s. Known for his crescent moon head, sunglasses, and playing the piano, the character used the song "Mack the Knife" , made famous in the United States by Bobby Darin. His style is nostalgic and cool. The appearance of Mac Tonight is a crescent moon head and the rest of his body is human, he wears sunglasses and wears a black suit with a tie of the same color. blue eyes colour.