Don Ameche
— Phil O'Neil (Credits) / Phil 'Mac' McNeil
Betty Grable
— Kathryn 'Kay' Latimer, also called Miss Adams
Robert Cummings
— Jeffrey 'Jeff' Boulton II
Jack Haley
— Jack O'Hara
Carole Landis
— Barbara Latimer, aka Miss Sears
Charlotte Greenwood
— Aunt Susan 'Sue' Latimer
Cobina Wright
— Connie Fentress
Lynne Roberts
— Jennie May
Robert Conway
— Mr. Lester
George Lessey
— William 'Willie' Boulton
Jack Cole
— Specialty Act
Robert Greig
— Brearley, Boulton's Butler
Minor Watson
— Mr. Jim Reynolds
Fortunio Bonanova
— Mr. Pretto, the Hotel Manager
George Humbert
— Texas Tommy Cafe Proprietor
Spencer Charters
— Joe, the Postman
Gino Corrado
— Boulton's Chef (uncredited)
Hermes Pan
— Kay's Dance Partner in Conga Number (uncredited)