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 Al Molinaro Al Delvecchio Guest Star Scott Baio Chachi Arcola Guest Star Lynda Goodfriend Lori Beth Allen Guest Star Cathy Silvers Jenny Piccalo Guest Star Ted McGinley Roger Phillips Guest Star Lisa Donaldson Alicia Guest Star Ken Lerner Rocco Baruffi Guest Star Derrel Maury Johnny Suede Guest Star Dennis Mandel Eugene Belvin Guest Star Harris Kal Bobby Guest Star Heidi Bohay Terry Guest Star Richard Beauchamp Shades Guest Star Alice Nunn Mama Delvecchio Guest Star Teddi Siddal Hillary Guest Star D.D. Howard Corrine Guest Star Candace Silvers Carla Bee Guest Star Priscilla Allen Mrs. Von Huene Guest Star Bo Sabato Umpire Guest Star Jerry Paris Director