Phil Harris

O'Malley (voice)

Eva Gabor

Duchess (voice)

Sterling Holloway

Roquefort (voice)

Scatman Crothers

Scat Cat (voice)

Paul Winchell

Chinese Cat (voice)

Vito Scotti

Italian Cat (voice)

Thurl Ravenscroft

Russian Cat (voice)

Nancy Kulp

Frou-Frou (voice)

Pat Buttram

Napoleon (voice)

George Lindsey

Lafayette (voice)

Monica Evans

Abigail (voice)

Carole Shelley

Amelia (voice)

Charles Lane

Lawyer (voice)

Hermione Baddeley

Madame (voice)

Roddy Maude-Roxby

Butler (voice)

Bill Thompson

Uncle Waldo (voice)

Ruth Buzzi

Frou-Frou (singing voice) (uncredited)

June Foray

Cat Screeches (uncredited)

Clarence Nash

Cat Screeches (uncredited)

Peter Renaday

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