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
J
John Friedrich
Roy Slater
Kelly Ward
Tom Shuster
S
Skip Lowell
Bruce Shuster
John Megna
Smith
Vernee Watson
Gwen
Darrell Zwerling
Mr. Brister
P. J. Soles
Deborah
T
Timothy Himes
Obnoxious Reporter
Victor Brandt
TV Installer
H
Hilda Haynes
The Nurse
Jack McLaughlin-Gray
Principal
E
Erna Foxworth
Neighbor
K
Karri Kirsch
Gina at 3 Years Old
K
Kimberly Kirsch
Gina at 3 Years Old
S
Seth Wagerman
Tod at 3 Years Old
Anne Ramsey
Rachel
L
Len Felber
Graduation Spectator (uncredited)