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)
Amy Baer Amy (as Amy Bosley) Amy (as Amy Bosley) See fewer	Brian Banks (2018)
Scott Marshall Scotti (as Scotti Marshall) Scotti (as Scotti Marshall) See fewer	Overboard (1987)
Kathleen Marshall Kathi (as Kathi Marshall) Kathi (as Kathi Marshall) See fewer	The Princess Diaries 2: Royal Engagement (2004)
Debbie Chaffin Rollerskater Offering Lessons (uncredited) Rollerskater Offering Lessons (uncredited) See fewer	Barnaby Jones (1973)
Hillary Horan Girl in Red Jacket (uncredited) Girl in Red Jacket (uncredited) See fewer	Young Doctors in Love (1982)
Heather Warren Girl Wearing Beret (uncredited) Girl Wearing Beret (uncredited) See fewer	Happy Days (1974)