Sammy, the Way-Out Seal

Michael McGreevey

Arthur Loomis

Bill Mumy

Petey Loomis

Jack Carson

Harold Sylvester

Robert Culp

Chester 'Chet' Loomis

Ann Jillian

Porsche 'Rocky' Sylvester

Patricia Barry

Helen Loomis

Elisabeth Fraser

Lovey Sylvester

Renie Riano

Mrs. Crotty

Mary Mitchel

Sue Foster

Claude Stroud

Ben

Bill Baldwin

Party Guest (uncredited)

Benjie Bancroft

Party Guest (uncredited)