Waterfront rivals George Darcy and Big Tim Ryan are both in love with Rose Kelly, and continue their feud when they join the Navy. After the war, they call a temporary truce to take on dope peddlers who are destroying their neighborhood.
| Actor | Role |
|---|---|
 George O'BrienGeorge Darcy | George Darcy |
 Janet GaynorRose Kelly | Rose Kelly |
 William RussellBig Tim Ryan | Big Tim Ryan |
 Margaret LivingstonMrs. Mary Rohan | Mrs. Mary Rohan |
 Robert EdesonChaplain Regan - aka Father Joe | Chaplain Regan - aka Father Joe |
 Philip FordLimpy Darcy | Limpy Darcy |
 David ButlerNick 'Dizzy' Galvani | Nick 'Dizzy' Galvani |
| LLew ShortSergeant Kelly | Sergeant Kelly |
| RRalph SipperlySlats 'Dip' Mulligan | Slats 'Dip' Mulligan |
| JJerry MaddenBaby Tom | Baby Tom |