William James Mitchell Jr. is an American video game player. He achieved fame throughout the 1980s and 1990s through claiming numerous records on classic video games, including a perfect score on Pac-Man. Twin Galaxies and Guinness World Records recognized Mitchell as the holder of several records on classic games, and he has appeared in several documentaries on competitive gaming and retrogaming. However, in 2017, the legitimacy of a number of his records was called into question, leading to Twin Galaxies stripping Mitchell of his records.

The King of Kong: A Fistful of Quarters is a 2007 American documentary film about competitive arcade gaming directed by Seth Gordon. It follows Steve Wiebe in his attempts to take the high score record for the 1981 arcade game Donkey Kong from Billy Mitchell. The film premiered at the 2007 Slamdance Film Festival and was released in U.S. theaters in August 2007. It received positive reviews.