Judy Garland as Nellie Kelly / Little Nellie Kelly

George Murphy as Jerry Kelly

Charles Winninger as Michael Noonan

Douglas McPhail as Dennis Fogarty

Arthur Shields as Timothy Fogarty

Rita Page as Mary Fogarty

Forrester Harvey as Moriarity

James Burke as Sergeant McGowan

George Watts as Keevan

Ernie Alexander as Expectant Father (uncredited)

Bill Armstrong as Ireland Crony (uncredited)

Hooper Atchley as Police Surgeon (uncredited)

Barbara Bedford as Miss Wilson (uncredited)

Margaret Bert as Miss Deane (uncredited)

Edward Biby as Party Guest (uncredited)

Henry Blair as Young Dennis Fogarty (uncredited)

Sven Hugo Borg as Immigrant at Citizenship Ceremony (uncredited)

Robert Bradford as Singer (uncredited)

James Carlisle as Party Guest (uncredited)

Larry Clifford as Irish Crony in Pub (uncredited)

Earl Covert as Singer (uncredited)

Joseph Crehan as Commissioner O'Brien (uncredited)

Vondell Darr as Dancing Girl (uncredited)

Tom Dillon as Father Malone (uncredited)

George Guhl as Postman (uncredited)

Charles Halton as Second Judge (uncredited)

Hubert Head as Singer (uncredited)

Edward Hearn as Second Court Clerk (uncredited)

George Hoagland as Party Guest (uncredited)

Robert Homans as Dooley Pub Owner (uncredited)

Shep Houghton as Party Guest (uncredited)

Bob Ingersoll as Irish Crony in Pub (uncredited)

Robert Emmett Keane as Dr. Walton (uncredited)

Milton Kibbee as First Court Clerk (uncredited)

Cathy Lewis as Western Union Operator (uncredited)

Charles McAvoy as Policeman (uncredited)

George McKay as Workman at Fogarty's (uncredited)

Sidney Miller as Boy at Dance (uncredited)

Howard M. Mitchell as Detective Boyd (uncredited)

Pat Moriarity as Workman at Fogarty's (uncredited)

Edmund Mortimer as Guest at Policeman's Ball (uncredited)

Norman Nielson as Singer I Love You' (uncredited)

Frank O'Connor as Irish Crony in Pub (uncredited)

Pat O'Malley as Mounted Policeman (uncredited)

Lee Phelps as Detective Barter (uncredited)

John Power as Irish Crony in Pub (uncredited)

John Raitt as Intern (uncredited)

Bob Reeves as Party Guest (uncredited)

Peggy Remington as Party Guest (uncredited)

Addison Richards as Naturalization Judge (uncredited)

Cyril Ring as Man Bumped by Dennis (uncredited)

Mel Ruick as Bandleader (uncredited)

Harry Semels as Immigrant at Citizenship Ceremony (uncredited)

Almira Sessions as Miss Corrigan (uncredited)

Cap Somers as Party Guest (uncredited)

Douglas Spencer as Policeman in Dance Line (uncredited)