Minor Recurring Characters
- Josh Andrew Koenig as Richard Milhous “Boner” Stabone (1985-1989, character was mentioned during flashbacks in the series finale in 1992); Mike’s friend.
- K.C. Martel as Eddie; Mike’s friend.
- Lisa Capps as Debbie (1987-1988)
- Rachael Jacobs as Shelley (1987-1988)
- Jane Powell as Irma Seaver (1988-1990); Jason’s mother.
- Philip Seymour Hoffman as Cousin Lou (1988-1990)
- Gordon Jump as Ed Malone (1989-1991); Maggie’s father.
- Betty McGuire as Kate Malone (1989-1991); Maggie’s mother.
- Chelsea Noble as Kate MacDonald (1989-1992)
- Jamie Abbott as Stinky Sullivan (frequent guest star 1987-1989, regular cast member 1989-1991); Ben’s friend.
- Julie McCullough as Julie Costello (1989-1990); Mike’s former girlfriend.
- Bill Kirchenbauer as Coach Graham Lubbock (1987–1988 on Growing Pains, starred in spin-off Just the Ten of Us); gym teacher.
- Sam Anderson as Principal Willis DeWitt (frequent guest star); who had started as Mike’s history teacher early in the series.
Notable Guest Stars
- Matthew Perry (3 episodes)
- Brad Pitt (2 episodes, but as different characters)
- Candace Cameron Bure (2 episodes)
- Dana Plato (1 episode)
- Hilary Swank (1 episode)
- Heather Graham (2 episodes, but as different characters)
- James T. Callahan (1 episode)
- Dennis Haysbert (2 episodes, both as a cop)
- Jenny Lewis (1 episode)
- Kelly Rowan (1 episode)
- Judith Barsi (1 episode)
- Kelly Hu (3 episodes)
- Leah Remini (1 episode)
- Kristy Swanson (1 episode)
