Name	Known for
Scott Baio Chachi Arcola Chachi Arcola See fewer	Superbabies: Baby Geniuses 2 (2004)
Erin Moran Joanie Cunningham Joanie Cunningham See fewer	Joanie Loves Chachi (1982)
Al Molinaro Al Delvecchio Al Delvecchio See fewer	The Odd Couple (1970)
Derrel Maury Mario Mastorelli Mario Mastorelli See fewer	Shadow of the Monarch (2017)
Art Metrano Uncle Rico Mastorelli Uncle Rico Mastorelli See fewer	Police Academy 3: Back in Training (1986)
Ellen Travolta Louisa Arcola Delvecchio Louisa Arcola Delvecchio See fewer	Grease (1978)
Winifred Freedman Annette Mastorelli Annette Mastorelli See fewer	Evolution (2001)
Robert Pierce Bingo (as Robert Peirce) Bingo (as Robert Peirce) See fewer	Suburbicon (2017)
Tom Bosley Howard Cunningham Howard Cunningham See fewer	Happy Days (1974)
Joy Claussen Carol Carol See fewer	The Bonfire of the Vanities (1990)
Gary Epp Tad Tad See fewer	The Flintstones in Viva Rock Vegas (2000)
Julie Paris Girl #2 Girl #2 See fewer	Pretty Woman (1990)
Patti Proctor Girl #1 Girl #1 See fewer	Young Doctors in Love (1982)
Marion Ross Marion Cunningham Marion Cunningham See fewer	Superhero Movie (2008)