The Boy with Green Hair

Pat O'Brien

Gramp Fry

Robert Ryan

Dr. Evans

Barbara Hale

Miss Brand

Dean Stockwell

Peter

Richard Lyon

Michael

Walter Catlett

The King

Samuel S. Hinds

Dr. R.T. Knudson

Regis Toomey

Mr. Davis

Charles Meredith

Mr. Piper

David Clarke

Barber

Billy Sheffield

Red

Johnny Calkins

Danny

Teddy Infuhr

Timmy

Dwayne Hickman

Joey

Eilene Janssen

Peggy

Curtis Loys Jackson Jr.

Classmate

Charles Arnt

Mr. Hammond

Russ Tamblyn

Classmate (uncredited)

Dale Robertson

Policeman (uncredited)

Michael Losey

Boy (uncredited)