Peter Sellers

Harold

Jo Van Fleet

Mother

Leigh Taylor-Young

Nancy

Joyce Van Patten

Joyce

David Arkin

Herbie

Herb Edelman

Murray

Salem Ludwig

Father

Louis Gottlieb

Guru

Grady Sutton

Funeral Director

Jorge Moreno

Mr. Rodriguez

Ed Peck

Man in Dress Shop

Eddra Gale

Love Lady

Sidney Clute

Mechanic

Roy Glenn

Gas Station Attendant

Karen McKevic

Crying Hippie's Wife

Paul Mazursky

Hippie on Sidewalk (uncredited)

Uschi Digard

Hippie Extra (uncredited)

Ethelreda Leopold

Mourner (uncredited)

Bobbie Shaw Chance

Maid of Honor (uncredited)