Phil Harris

as O'Malley (voice)

Eva Gabor

as Duchess (voice)

Sterling Holloway

as Roquefort (voice)

Scatman Crothers

as Scat Cat (voice)

Paul Winchell

as Chinese Cat (voice)

Lord Tim Hudson

as English Cat (voice)

Vito Scotti

as Italian Cat (voice)

Thurl Ravenscroft

as Russian Cat (voice)

Dean Clark

as Berlioz (voice)

Liz English

as Marie (voice)

Gary Dubin

as Toulouse (voice)

Nancy Kulp

as Frou-Frou (voice)

Pat Buttram

as Napoleon (voice)

George Lindsey

as Lafayette (voice)

Monica Evans

as Abigail (voice)

Carole Shelley

as Amelia (voice)

Charles Lane

as Lawyer (voice)

Hermione Baddeley

as Madame (voice)

Roddy Maude-Roxby

as Butler (voice)

Bill Thompson

as Uncle Waldo (voice)

Ruth Buzzi

as Frou-Frou (singing voice) (uncredited)

June Foray

as Cat Screeches (uncredited)

Clarence Nash

as Cat Screeches (uncredited)

Peter Renaday

as Milkman / Le Petit Café Cook / Truck Movers (voice) (uncredited)

Teresinha Moreira

as Goose (voice)