Melissa Sue Anderson

Molly Rush

Doug McKeon

Harry Woodward

Kristoff St. John

Mario

Steven Bauer

Duncan Widders (as Rocky Bauer)

Bill Calvert

Max

Kendall Kay Munsey

Beatrice

Pat Finley

June Woodward

John Colenback

Andrew Woodward

Paul Hostetler

Professor Budnick (as Paul Hosteller)

Robert Loper

Amberman (as Dr. Robert Loper)

Stephanie Shine

Hilary

Steve Suttich

Volleyball Coach

Sheryl Drummond

Clerk

Susan Fenberg

Stewardess (as Sue Fenberg)

Denise Frisino

Librarian

Dale Holdren

Student

David Brachtenbach

Molly's Classmate Friend (uncredited)