Name	Known for
Ron Howard Richie Cunningham Richie Cunningham See fewer	Arrested Development (2003)
Henry Winkler Arthur 'Fonzie' Fonzarelli Arthur 'Fonzie' Fonzarelli See fewer	The Waterboy (1998)
Marion Ross Marion Cunningham Marion Cunningham See fewer	Superhero Movie (2008)
Anson Williams Potsie Weber Potsie Weber See fewer	Happy Days (1974)
Don Most Ralph Malph (as Donny Most) Ralph Malph (as Donny Most) See fewer	Happy Days (1974)
Erin Moran Joanie Cunningham Joanie Cunningham See fewer	Joanie Loves Chachi (1982)
Tom Bosley Howard Cunningham Howard Cunningham See fewer	Happy Days (1974)
Al Molinaro Al Delvecchio Al Delvecchio See fewer	The Odd Couple (1970)
Scott Baio Chachi Arcola Chachi Arcola See fewer	Superbabies: Baby Geniuses 2 (2004)
Robert Burke Tom McKenna Tom McKenna See fewer	Natural Enemies (1979)
Alan Wedner Brad Donnelly Brad Donnelly See fewer	Barnaby Jones (1973)
Judy Landers Boom Boom Boom Boom See fewer	Armed and Dangerous (1986)
Nora Eckstein Claudia (as Nora Morgan) Claudia (as Nora Morgan) See fewer	17 Again (2009)
Lillian Laserson Darlene Darlene See fewer	Happy Days (1974)