The Young Racers

Mark Damon

Stephen Children

William Campbell

Joe Machin

Luana Anders

Henrietta "Henny" Weston

Marie Versini

Sesia Machin

R. Wright Campbell

Robert Machin

Patrick Magee

Sir William Dragonet

John McLaren

Lotus Team Manager

Milo Quesada

Italian Driver

Anthony Marsh

Announcer

Margrete Robsahm

Lea Anderson

Christina Gregg

Daphne

Béatrice Altariba

Monique

Roger Corman

Man Outside Monaco Hotel (uncredited)

Francis Ford Coppola

(uncredited)

Bruce McLaren

Bruce McLaren (uncredited)