| Ben Affleck | Joe Coughlin |
| Elle Fanning | Loretta Figgis |
| Brendan Gleeson | Thomas Coughlin |
| Chris Messina | Dion Bartolo |
| Sienna Miller | Emma Gould |
| Zoe Saldana | Graciella Suarez |
| Chris Cooper | Chief Irving Figgis |
| Robert Glenister | Albert White |
| Miguel J. Pimentel | Esteban Suarez |
| Titus Welliver | Tim Hickey |
| Max Casella | Digger Pescatore |
| Christian Clemenson | Ritz Investor |
| J.D. Evermore | Virgil Beauregard |
| Clark Gregg | Calvin Bondurant |
| Anthony Michael Hall | Gary L. Smith |
| Chris Sullivan | Brennan Loomis |
| Benny Ciaramello | Paulo Bartolo |
| Derek Mears | Donnie Gishler |
| Danny Kitz | Broomfield Waiter |
| Bobby Curcuro | North End Local |
| Bruce Serafin | Large Italian |
| Massi Furlan | Anthony Servidone |
| Lewis D. Wheeler | Herald Reporter |
| Michael Mantell | Jack Jarvis |
| Tom Virtue | Doctor |
| Giuseppe Losavio | Illario Noble |
| Peter Arpesella | Gino Valocco |
| Zak Lee Guarnaccia | Adomo Valocco |
| Ric Sarabia | JT |
| Derrick Dover | Esteban's Bodyguard |
| Gianfranco Terrin | Carmine |
| Peter Sabri | Wallace |
| Andrew Bongiorno | Fasani |
| Eduardo Cruz | Factory News Reader |
| Ryan Young | J&D Crew |
| Stanley M. Farrow | Shine Runner |
| Michael Chieffo | Pastor |
| Austin Swift | Mayweather |
| Anthony Palermo | Fausto Scarfone |
| David Fierro | Seppe |
| Gabriel Silva | Tomas |
Technical Credits
| Ben Affleck | Director,Producer,Screenwriter |
| Madison Ainley | Co-producer |
| Ernest Avila | Set Decoration/Design |
| Chris Brigham | Executive Producer |
| Lorrie Campbell | Set Decoration/Design |
| Chay Carter | Executive Producer |
| Steve Christensen | Art Director |
| Steve Cremin | Special Effects Supervisor |
| Jennifer Davisson | Producer |
| Leonardo DiCaprio | Producer |
| William C. Goldenberg | Editor |
| Jess Gonchor | Production Designer |
| Harry Gregson-Williams | Score Composer |
| Jim Hewitt | Set Decoration/Design |
| Brandon Jones | Sound/Sound Designer |
| Dennis Lehane | Executive Producer |
| Mindy Marin | Casting |
| Robert Richardson | Cinematographer |
| Jamal Sims | Choreography |
| Paul Sonski | Set Decoration/Design |
| Jennifer Todd | Producer |
| David J. Webb | Asst. Director,Co-producer |
| Jacqueline West | Costumes/Costume Designer |
