Jerry Lewis as Norman Phiffer

Jill St. John as Barbara Tuttle

Ray Walston as Mr. Quimby

John McGiver as Mr. John P. Tuttle

Agnes Moorehead as Mrs. Phoebe Tuttle

Francesca Bellini as Shirley Lott

Nancy Kulp as Emily Rothgraber

Quinn O'Hara as Elevator Operator

John Abbott as Mr. Orlandos

Fritz Feld as Irving Catastrophe

Bess Flowers as Shopper, Gourmet Department (uncredited)

Dick Wessel as Traffic Cop

Richard Deacon as Tie Salesman

Kathleen Freeman as Mrs. Glucksman

Milton Frome as Francois

Isobel Elsom as Hazel

Mary Treen as Mattress Customer

Peggy Mondo as Lady Wrestler

Mary Jane Carey as Alice, the Maid (uncredited)

Robert Carson as Mr. Salzbury, Phoebe's Secretary (uncredited)

Richard Collier as Customer (uncredited)

Mickey Finn as Taxi Driver (uncredited)

Joseph Forte as Butler (uncredited)

Byron Foulger as Sale Department Manager (uncredited)

Joe Gray as Herman, the Shoplifter (uncredited)

Hallene Hill as Little Woman (uncredited)

Kenner G. Kemp as Bystander (uncredited)

Muriel Landers as Girdle Lady (uncredited)

Del Moore as Department Store Announcer (voice) (uncredited)

Carmen Nisbet as Salesgirl (uncredited)

Quinn O'Hara as Elevator Operator (uncredited)

Barbara Pepper as Customer at Bargain Sale (uncredited)

Felice Richmond as Woman in Bargain Basement (uncredited)

Sheila Rogers as Nurse (uncredited)

Michael Ross as Caretaker (uncredited)

Mabel Smaney as Mary Statler (uncredited)

Harry Spear as Customer (uncredited)

Glen Walters as Tall Woman in Bargain Basement (uncredited)