Arthur Herbert Fonzarelli (also known as The Fonz or simply Fonzie) is a fictional character played by Henry Winkler in the American sitcom Happy Days (1974-1984).

Fonzie was originally a secondary character on the show, but he became the de facto lead rather quickly, dwarfing the other characters in popularity by the mid-1970s. He would eventually receive top billing on the show once Ron Howard left in 1980. He is known globally for his catchphrases: "Whoa", and "Aaay!" while snapping his fingers, and forming a thrust-forward double thumbs up. A bronze statue of The Fonz will be unveiled in Milwaukee in the fall of 2008.