Main •
Alan Thicke as Dr. Jason Roland Seaver. Dr. Seaver is a graduate of
Boston College and holds a Doctorate in Psychology. He initially practiced at
Long Island General Hospital before working from home and volunteering at his local community's free clinic. •
Joanna Kerns as Margaret Katherine "Maggie" (née Malone) Seaver. Maggie is also a graduate of
Boston College where she met her future husband and majored in
Child Psychology before switching to
Journalism. Prior to her marriage, she worked as a researcher for
Newsweek magazine. Due to her pre-marriage popularity in journalism, she continues to utilize her maiden name in professional settings. She is a reporter for the
Long Island Daily Herald and for the television news program
Action News on Channel 19. She is also a columnist for the
Long Island Sentinel. •
Kirk Cameron as Michael Aaron "Mike" Seaver. Mike, the oldest child, attended Wendell Willkie Elementary School before moving to Dewey High School. He accumulates multiple menial jobs.
Waiter at The World of Burgers,
Salesman at The Stereo Village,
Car wash attendant, night man at the Stop and Shop
convenience store, singing waiter at Sullivan's Tavern. Of average ability, he aspires nonetheless to become an actor. He enrolls at Alf Landon Junior College and, later, at Boyton State College. At Alf Landon, Mike was a member of the Drama Club where he meets his girlfriend Kate McDonald in the play "The Passion". He eventually becomes a teacher of remedial studies at a
Community Health Centre. •
Tracey Gold as Caroline Anne "Carol" Seaver. Carol is the second born child. She attended Dewey High School where she was a candidate for the 1988
Homecoming Queen and President of the Future Nuclear Physicists Club. She later attends
Columbia University (to the disappointment of her parents who would have preferred her to enroll at their
alma-mater) but drops out to work as a computer page breaker at GSM Publishing. She returns to Columbia to study law and works with her father at the free clinic. •
Jeremy Miller as Benjamin Hubert Horatio Humphrey "Ben" Seaver. Ben attends the same elementary and high school as his siblings. Heavily influenced by his older brother, Ben holds a number of menial jobs including newspaper delivery boy and attempts to make money by managing a rap group.
Later additions • A fourth child, Christine Ellen "Chrissy" Seaver (twins Kelsey and Kirsten Dohring;
Ashley Johnson), is born at the beginning of season 4, a day after Ben's 12th birthday. She was played in her newborn/infant stage by 2 uncredited sets of twin sisters, who remained in the role until season 4 (1988–1989) ended. By season 5 (1989–1990), she was played in her toddler stage by alternating twins Kirsten and Kelsey Dohring. In seasons 6 and 7 (1990–1992), Chrissy's age was advanced to 5 years old and she was played by Ashley Johnson. • A new cast member was added for the seventh and final season (1991–1992) when homeless teen Luke Brower (
Leonardo DiCaprio) is brought into the Seaver family to live with them until the end of season 7.
Recurring •
Andrew Koenig as Richard Milhous "Boner" Stabone (seasons 1–4), Mike's friend; left to join the
United States Marine Corps. •
Chelsea Noble as Kate MacDonald (seasons 5–7), Mike's girlfriend. They both meet at Alf Landon Junior College. She later becomes a model and appears in the 1992
swimsuit edition of The Sporting Man magazine. • Jamie Abbott as Stinky Sullivan (seasons 2–6), Ben's friend. •
K. C. Martel as Eddie Ziff (seasons 1–7), Mike's friend. •
Sam Anderson as Principal Willis DeWitt (seasons 1–7), Mike's history teacher in season one and principal from season 2 onward. • Lisa Capps as Debbie (seasons 2–4), Carol's friend. • Rachel Jacobs as Shelley (seasons 2–4), Carol's friend. • Betty McGuire as Kate Malone (seasons 1–2 and 4-7); Maggie's mother. •
Gordon Jump as Ed Malone (seasons 1–2 and 4-7), Maggie's father. •
Julie McCullough as Julie Costello (seasons 4–5), Mike's former girlfriend who was originally hired by Jason to be Chrissy's nanny. Julie is a sophomore at
Columbia University majoring in Child Psychology. When she and Mike break up, she quits school and becomes a waitress at Le Village Restaurant. •
Bill Kirchenbauer as Coach Graham Lubbock (seasons 2–3; starred in spin off
Just the Ten of Us), a gym teacher. •
Jane Powell as Irma Seaver (seasons 4–6), Jason's mother. • Jodi Peterson as Laura Lynn (seasons 4–6), Ben's girlfriend/love interest. • Kevin Wixted as Bobby Wynette (seasons 2–3), Carol's boyfriend. • Christopher Burgard as Dwight Halliburton (season 7), Carol's love interest. •
Evan Arnold as Richie Flanscopper (seasons 1–3), Carol's school classmate who has a crush on her. •
Fred Applegate as Mr. Fred Tedesco (season 7), the principal of the learning annex where Mike teaches. •
Matthew Perry as Sandy (season 4), Carol's love interest of 3 episodes. He died several hours after a DUI accident following 'a few beers'. ==Episodes==