Ron Howard Richie Cunningham Actor Henry Winkler Arthur "Fonzie" Fonzarelli Actor Tom Bosley Howard Cunningham Actor Marion Ross Marion Cunningham Actor Erin Moran Joanie Cunningham Actor Scott Baio Chachi Arcola Guest Star Ted McGinley Roger Phillips Guest Star Lynda Goodfriend Lori Beth Allen Guest Star Cathy Silvers Jenny Piccalo Guest Star Al Molinaro Al Delvecchio Guest Star Harris Kal Bobby Guest Star Kevin Rodney Sullivan Tommy Guest Star Danny Ponce Danny Guest Star Pamela Dunlap Doris Charles Guest Star Bruce Gray Mr. Hillary Guest Star Meridith Baer Judy Guest Star Tom Silardi Tony Guest Star Ellen Travolta Louisa Arcola Guest Star Jerry Paris Director