Ron Howard Richie Cunningham Actor Henry Winkler Arthur "Fonzie" Fonzarelli Actor Tom Bosley Howard Cunningham Actor Marion Ross Marion Cunningham Actor Anson Williams Warren "Potsie" Weber Actor Don Most Ralph Malph Actor Erin Moran Joanie Cunningham Actor Al Molinaro Al Delvecchio Guest Star Ruth Cox Thunder McCoy Guest Star Lynda Goodfriend Lori Beth Allen Guest Star Jason Evers H.R. Buchanan Guest Star Brad Wilkin Phil Guest Star John Moskel T-Man Peterson Guest Star Suzi Quatro Leather Tuscadero Guest Star Scott Baio Chachi Arcola Guest Star Cliff Emmich Candy Man Guest Star Steve Richmond Mel Mullet Guest Star Lorrie Mahaffey Jennifer Jerome Guest Star Gino Conforti Sticky Guest Star Richard Moll Eugene Guest Star Jerry Paris Director