| Judy Garland | Nellie Noonan Kelly / Little Nellie Kelly | 
    
    
      | George Murphy | Jerry Kelly | 
    
    
      | Charles Winninger | Michael Noonan | 
    
    
      | Douglas McPhail | Dennis Fogarty | 
    
    
      | Arthur Shields | Timothy Fogarty | 
    
    
      | Rita Page | Mary Fogarty | 
    
    
      | Forrester Harvey | Moriarity | 
    
    
      | James Burke | Sergeant McGowan | 
    
    
      | George Watts | Keevan | 
    
    
      | Ernie Alexander | Expectant Father (uncredited) | 
    
    
      | Bill Armstrong | Ireland Crony (uncredited) | 
    
    
      | Hooper Atchley | Police Surgeon (uncredited) | 
    
    
      | Barbara Bedford | Miss Wilson the Nurse with Baby (uncredited) | 
    
    
      | Margaret Bert | Reception Nurse Miss Deane (uncredited) | 
    
    
      | Edward Biby | Party Guest (uncredited) | 
    
    
      | Henry Blair | Dennis Fogarty as a Child (uncredited) | 
    
    
      | Sven Hugo Borg | Immigrant at Citizenship Ceremony (uncredited) | 
    
    
      | Robert Bradford | Singer in 'Nellie Kelly I Love You' (uncredited) | 
    
    
      | James Carlisle | Party Guest (uncredited) | 
    
    
      | Larry Clifford | Irish Crony in Pub (uncredited) | 
    
    
      | Earl Covert | Singer in 'Nellie Kelly I Love You' (uncredited) | 
    
    
      | Joseph Crehan | Police Commissioner O'Brien (uncredited) | 
    
    
      | Vondell Darr | Girl Dancing with Boy at Dance (uncredited) | 
    
    
      | Tom Dillon | Father Malone (uncredited) | 
    
    
      | George Guhl | Postman (uncredited) | 
    
    
      | Charles Halton | Second Judge (uncredited) | 
    
    
      | Hubert Head | Singer in 'Nellie Kelly I Love You' (uncredited) | 
    
    
      | Edward Hearn | Second Court Clerk (uncredited) | 
    
    
      | George Hoagland | Party Guest (uncredited) | 
    
    
      | Robert Homans | Dooley Pub Owner in Ireland (uncredited) | 
    
    
      | Shep Houghton | Party Guest (uncredited) | 
    
    
      | Bob Ingersoll | Irish Crony in Pub (uncredited) | 
    
    
      | Robert Emmett Keane | Dr. Walton (uncredited) | 
    
    
      | Milton Kibbee | First Court Clerk (uncredited) | 
    
    
      | Cathy Lewis | Western Union Operator (uncredited) | 
    
    
      | Charles McAvoy | Policeman (uncredited) | 
    
    
      | George McKay | Bill a Workman at Fogarty's (uncredited) | 
    
    
      | Sidney Miller | Boy at Dance (uncredited) | 
    
    
      | Howard M. Mitchell | Detective Boyd (uncredited) | 
    
    
      | Pat Moriarity | Workman at Fogarty's (uncredited) | 
    
    
      | Edmund Mortimer | Guest at Policeman's Ball (uncredited) | 
    
    
      | Norman Nielson | Singer in 'Nellie Kelly I Love You' (uncredited) | 
    
    
      | Frank O'Connor | Irish Crony in Pub (uncredited) | 
    
    
      | Pat O'Malley | Mounted Policeman (uncredited) | 
    
    
      | Lee Phelps | Detective Barter (uncredited) | 
    
    
      | John Power | Irish Crony in Pub (uncredited) | 
    
    
      | John Raitt | Intern (uncredited) | 
    
    
      | Bob Reeves | Party Guest (uncredited) | 
    
    
      | Peggy Remington | Party Guest (uncredited) | 
    
    
      | Addison Richards | Naturalization Judge (uncredited) | 
    
    
      | Cyril Ring | Man Bumped by Dennis (uncredited) | 
    
    
      | Mel Ruick | Bandleader (uncredited) | 
    
    
      | Harry Semels | Immigrant at Citizenship Ceremony (uncredited) | 
    
    
      | Almira Sessions | Nellie's Nurse Miss Corrigan (uncredited) | 
    
    
      | Cap Somers | Party Guest (uncredited) | 
    
    
      | Douglas Spencer | Policeman in Dance Line (uncredited) |