 Judy GarlandNellie Kelly / Little Nellie Kelly | Nellie Kelly / Little Nellie Kelly |
 George MurphyJerry Kelly | Jerry Kelly |
 Charles WinningerMichael Noonan | Michael Noonan |
 Douglas McPhailDennis Fogarty | Dennis Fogarty |
 Arthur ShieldsTimothy Fogarty | Timothy Fogarty |
 Rita PageMary Fogarty | Mary Fogarty |
 Forrester HarveyMoriarity | Moriarity |
 James BurkeSergeant McGowan | Sergeant McGowan |
| GGeorge WattsKeevan | Keevan |
| EErnie AlexanderExpectant Father (uncredited) | Expectant Father (uncredited) |
| BBill ArmstrongIreland Crony (uncredited) | Ireland Crony (uncredited) |
 Hooper AtchleyPolice Surgeon (uncredited) | Police Surgeon (uncredited) |
 Barbara BedfordMiss Wilson (uncredited) | Miss Wilson (uncredited) |
| MMargaret BertMiss Deane (uncredited) | Miss Deane (uncredited) |
| EEdward BibyParty Guest (uncredited) | Party Guest (uncredited) |
| HHenry BlairYoung Dennis Fogarty (uncredited) | Young Dennis Fogarty (uncredited) |
 Sven Hugo BorgImmigrant at Citizenship Ceremony (uncredited) | Immigrant at Citizenship Ceremony (uncredited) |
| RRobert BradfordSinger (uncredited) | Singer (uncredited) |
| JJames CarlisleParty Guest (uncredited) | Party Guest (uncredited) |
| LLarry CliffordIrish Crony in Pub (uncredited) | Irish Crony in Pub (uncredited) |
| EEarl CovertSinger (uncredited) | Singer (uncredited) |
 Joseph CrehanCommissioner O'Brien (uncredited) | Commissioner O'Brien (uncredited) |
| VVondell DarrDancing Girl (uncredited) | Dancing Girl (uncredited) |
 Tom DillonFather Malone (uncredited) | Father Malone (uncredited) |
 George GuhlPostman (uncredited) | Postman (uncredited) |
 Charles HaltonSecond Judge (uncredited) | Second Judge (uncredited) |
| HHubert HeadSinger (uncredited) | Singer (uncredited) |
 Edward HearnSecond Court Clerk (uncredited) | Second Court Clerk (uncredited) |
| GGeorge HoaglandParty Guest (uncredited) | Party Guest (uncredited) |
 Robert HomansDooley Pub Owner (uncredited) | Dooley Pub Owner (uncredited) |
