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 Lynda Goodfriend Lori Beth Allen Guest Star Teris Wyss Christy Riggerheimer Guest Star Marcia Lewis Mother Dunbar Guest Star Jerry Paris Director