Pamela Sue Martin
Abby
Betsy Slade
Muffy
Parker Stevenson
Michael
George O'Hanlon, Jr.
Malcolm
Karen Balkin
Laura
Debralee Scott
Ann
Nora Heflin
Emmy
Kathryn Holcomb
Helen
Roderick Cook
Headmaster
Edith Atwater
Mrs. Pendleton
M
Marijane Maricle
Miss Picard
Meg Wyllie
Nurse
Mary Jackson
Miss Moran
Carol Arthur
Gym Teacher
Hope Summers
Biology Teacher
Jerry Hardin
Mr. Keats
Robert Walden
Frank
L
Luke Andreas
Marge
Darrell Zwerling
Dr. Madden
Lou Frizzell
Dr. Freeman
Michael Gray
Buzzy
Helene Winston
Mrs. H
H
Helen Baron
Mrs. Reed
Cliff Emmich
Hotel Clerk
H
Herbert Nelson
Minister
J
James Brodhead
St. Ambrose Headmaster
C
Christopher Man
David
D
Diana Webster
Mrs. Clairmont
R
Ron Kolman
Jamie Clairmont
Bob Harks
Party Guest (uncredited)