Mickey Rooney as Tommy Williams

Judy Garland as Penny Morris

Fay Bainter as Miss Jones

Virginia Weidler as Jo Conway

Ray McDonald as Ray Lambert

Richard Quine as Morton Hammond

Donald Meek as Mr. Stone

Alexander Woollcott as Alexander Woollcott

Luis Alberni as Nick

James Gleason as Thornton Reed

Emma Dunn as Mrs. Williams

Frederick Burton as Mr. Morris

Cliff Clark as Inspector Moriarity

William Post Jr. as Announcer

William Ripley Dorr as Church Choir (uncredited)

Will Lee as Shorty, Drugstore Waiter / Cook (uncredited)

Sidney Miller as Tony (uncredited)

Margaret O'Brien as Maxine (uncredited)

Joe Yule as Mason, Reed's Assistant

Anne Rooney as Hammond's Singing Partner

Donna Reed as Secretary (uncredited)

Jack 'Tiny' Lipson as Hefty Customer at Nick's (uncredited)

Lester Dorr as Reed's Writer (uncredited)