John Travolta
Tod Lubitch
Glynnis O'Connor
Gina Biggs
Robert Reed
Johnny Lubitch
Diana Hyland
Mickey Lubitch
Karen Morrow
Martha Biggs
Howard Platt
Neighbor
Buzz Aldrin
Himself
Ralph Bellamy
Dr. Gunther
John Friedrich
Roy Slater
Kelly Ward
Tom Shuster
Skip Lowell
Bruce Shuster
John Megna
Smith
Darrell Zwerling
Mr. Brister
P.J. Soles
Deborah
Timothy Himes
Obnoxious Reporter
Victor Brandt
TV Installer
Hilda Haynes
The Nurse
Jack McLaughlin-Gray
Principal
Erna Foxworth
Neighbor
Karri Kirsch
Gina at 3 Years Old
Kimberly Kirsch
Gina at 3 Years Old
Seth Wagerman
Tod at 3 Years Old
Anne Ramsey
Rachel
Len Felber
Graduation Spectator (uncredited)