Gig Young
— Mike Kelton
Carol Lynley
— Susannah Whately Kelton / Sarah
Oliver Reed
— Ethan
Flora Robson
— Aunt Agatha
Judith Arthy
— Emma
Ann Bell
— Mary Whately, Susannah's Mother
William Devlin
— Zebulon Whately
Charles Lloyd Pack
— Barge Master
Bernard Kay
— Tait
Rick Jones
— Luther Whately
Celia Hewitt
— Aunt Sarah
Robert Cawdron
— John Whately, Susannah's Father
Murray Evans
— Gang Member
Cliff Diggins
— Gang Member
Peter Porteous
— Gang Member
Donald Sutherland
— Zebulon (voice)
Ingrid Bower
— Village Girl (uncredited)