Henry Winkler Arthur "Fonzie" Fonzarelli Actor Tom Bosley Howard Cunningham Actor Marion Ross Marion Cunningham Actor Anson Williams Warren "Potsie" Weber Actor Erin Moran Joanie Cunningham Actor Scott Baio Chachi Arcola Guest Star Lynda Goodfriend Lori Beth Allen Guest Star Al Molinaro Al Delvecchio Guest Star Ted McGinley Roger Phillips Guest Star Wil Albert Mr. Bellgoodie Guest Star Dennis Mandel Eugene Belvin Guest Star Harris Kal Bobby Guest Star Kevin Sullivan Tommy Guest Star Merie Earle Mrs. Frick Guest Star Raymond Guth Mr. Gampolo Guest Star Jerry Paris Director