Bing Crosby as Harvey Howard

Fabian as Gil Sparrow

Tuesday Weld as Joy Elder

Nicole Maurey as Prof. Helene Gauthier

Richard Beymer as Bob Bannerman

Patrick Adiarte as T.J. Padmanagham

Yvonne Craig as Randy 'Scoop' Pruitt

Gavin MacLeod as Professor Thayer

Jimmy Boyd as Robert Higgson

Kenneth MacKenna as President Byrne of Pinehurst

Nina Shipman as Laura Howard

Angus Duncan as Harvey Howard Jr.

Carla Borelli as Harvey Jr.'s Date at Ball (uncredited)

Dick Crockett as Bones McKinney (uncredited)

Douglass Dumbrille as Judge Carter (uncredited)

Don Gazzaniga as Bit Role (Uncredited)

Byron Kane as Professor (Uncredited)

Jimmie Horan as Minor Role (Uncredited)

James Lanphier as Burdick, Maitre D' at Harvey Howard's (uncredited)

Jeffrey Sayre as Helps Harvey from Floor at Dance (uncredited)

Frank J. Scannell as Auctioneer at College (Uncredited)

Emerson Treacy as Professor (Uncredited)

Irene Vernon as Matron (Uncredited)

David Ahdar as Ball Guest (Uncredited)

Shirley Blackwell as Rower (Uncredited)

Alvin Childress as Guest Announcer at Judge Carter's Ball (uncredited)

Roy Clark as Ball Guest (Uncredited)

James Elsegood as Ball Guest (Uncredited)

Fred Hansen as Ball Guest (Uncredited)

Maurice Kelly as Ball Guest (Uncredited)

Johnny Lee as Servant at Judge Carter's Ball (uncredited)

Bert May as Ball Guest (Uncredited)

Mary Patton as Matron (Uncredited)

Art Salter as Gas Station Attendant (uncredited)

Elisabeth Talbot-Martin as Matron (Uncredited)

Ernestine Wade as Judge Carter's Maid (Uncredited)

H.E. West as Bit Role (Uncredited)