Don Most is an American actor and singer. He played Ralph Malph on the TV show Happy Days alongside Ron Howard and Henry Winkler, and has also voiced characters in animated shows including Teen Wolf and Family Guy. Most has appeared in movies such as Stewardess School and Unsung Hero, and directed the films Moola and Harley's Hill. He has also released music, including his 1976 self-titled pop debut and 2023's New York High.