Bobby O'Grady
Mouse
Seamus
Skunk
Mickey Pat
Gallivan (as George Macdonald)
Digger
Fitzie
Herbie
Red
Katy
Sheila
Brosnihan
Teddy
Jackie O'Hara
Shang
Gavin
Hanlon
Lee
Mrs. O'Grady
Father Donahue
John Kelsey (as Gene Boles)
Mrs. Timmons
Annie
Marcy
Kid
Mrs. Turbody
Bar Owner
Young Bobby (in still photo)
Bobby's Dad (in still photo)
Young Mouse (in still photo)
Young Teddy (in still photo)
Young Jackie (in still photo)
Dock Worker (in still photo)
Woman in Bathing Suit (in still photo)
Charlestown Townie (uncredited)
Townie (uncredited)
Police Officer (uncredited)