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 Beatrice Colen Marsha Simms Guest Star Linda Purl Gloria Guest Star Neil J. Schwartz Bag Zombroski Guest Star Garry Marshall Director