'Happy Days' Star Donny Most Turns 72: Here's What He's Doing Now originally appeared on Parade. Entertainer Don Most is known by most of his fans for his time playing Ralph Malph on Happy Days.

Ron Howard and Henry Winkler reunited with their “Happy Days” co-stars Anson Williams and Don Most for the first time in 50 years at Steel City Con in Pittsburgh on Saturday. The foursome participated ...