- Kathrine Narducci - Carrie Bufalino
- Welker White - Josephine 'Jo' Hoffa
- Jesse Plemons - Chuckie O'Brien
- Jack Huston - Robert Kennedy - RFK
- Domenick Lombardozzi - 'Fat Tony' Salerno
- Paul Herman - 'Whispers' DiTullio
- Louis Cancelmi - 'Sally Bugs'
- Gary Basaraba - Frank 'Fitz' Fitzsimmons
- Marin Ireland - Older Dolores Sheeran
- Sebastian Maniscalco - 'Crazy Joe' Gallo
- Steven Van Zandt - Jerry Vale
- Lucy Gallina - Young Peggy Sheeran
- Jonathan Morris - Assisted Living Priest
- Dascha Polanco - Nurse
- Bo Dietl - Joe Glimco
- Aleksa Palladino - Mary Sheeran
- Daniel H. Jenkins - E. Howard 'Big Ears' Hunt
- Jim Norton - Don Rickles
- Billy Smith - FBI Agent #1
- Kevin O'Rourke - John McCullough
- Action Bronson - Casket Salesman
- Glenn Cunningham - Investigator
- Paul Ben-Victor - Jake Gottlieb
- Patrick Gallo - Anthony 'Tony Jack' Giacalone
- James Martin - Mother of Sorrows Priest
- Jake Hoffman - Allen Dorfman
- Barry Primus - Ewing King
- Danny A. Abeckaser - 'Deadbeat'
- Anthony J. Gallo - Food Fair Manager
- J.C. MacKenzie - Prosecutor Jim Neal
- Joseph Bono - Frank Sindone
- Jamil Antonio Stefan - Phil Testa
- Louis Vanaria - Dave Ferrie
- Craig Vincent - Ed Partin
- Joseph Riccobene - Jimmy 'The Weasel' Fratianno
- Vinny Vella - Meat Company Yard Manager
- Thomas E. Sullivan - Warren Swanson
- Robert Mladinich - Anastasia's Bodyguard
- Rich Reilly - Phil the Bartender
- Robert Funaro - Johnny - Friendly Lounge
- Tess Price - Young Maryanne Sheeran
- Jennifer Mudge - Older Maryanne Sheeran
- India Ennenga - Young Dolores
- Jordyn DiNatale - Young Connie Sheeran
- Kate Arrington - Older Connie Sheeran
- Bernie Martin - Teamster
- Philip Suriano - Silver Shop Owner
- Tony Suriano - Silver Shop Owner's Son
- Jason A. Iannacone - German Prisoner #1
- Michael C. Brennan - German Prisoner #2
- James P. Harkins - John the Redhead
- Al Linea - Sam 'Momo' Giancana
- Garry Pastore - Albert Anastasia
- Frank Pietrangolare - Bartender - Friendly Lounge
- Frank Aquilino - Friendly Lounge Guy 'Butchie'
- Johnny T. Sollitto - Friendly Lounge Patron
- Patrick Murney - Peggy's Godfather
- Samantha Soule - Peggy's Godmother
- Richard V. Licata - Judge - Frank's First Trial
- Vito Picone - Villa Roma Manager
- Larry Mazza - Anastasia's Hitman #1
- Craig DiFrancia - Anastasia's Hitman #2
- Ira Drukier - Motel Manager
- Jon Bruno - Russell's Bodyguard
- Paul Borghese - Mobster #1 - Curtain Shop
- Steven Maglio - Mobster #2 - Curtain Shop / Copa Guest #1
- James Licata - Mobster #3 - Curtain Shop
- Veronica Alicino - Curtain Shop Staff #1
- Mike Massimino - Curtain Shop Staff #2
- James Ciccone - Anastasia's Mobster in Car #1
- Ron Castellano - Anastasia's Mobster in Car #2
- Aldo Sergi - Aldo
- James Lorinz - Hoffa's Rally Teamster #1
- Jeffrey Paul - Hoffa's Rally Teamster #2
- Robert C. Kirk - Hoffa's Rally Teamster #3
- Vince Maritato - Bathhouse Teamster
- Lawrence Smith - Louis
- Rebecca Faulkenberry - Barbara Hoffa
- Ken Wulf Clark - James P. Hoffa
- John Rue - Senator McClellan
- Steve Routman - Hoffa's Attorney - George Fitzgerald
- Fernando Vera - Castellito's Driver
- Peter Claymore - Tough Teamster - Hoffa's Office
- Charles DelGatto - Phil - Milestone Hauling
- Michael Gongora - Cuban Worker
- Eugene Bunge - Joseph Kennedy
- Matthew F. O'Connor - Pro Rally Teamster #1
- Cliff Moylan - Pro Rally Teamster #2
- Vincenzo DelRiccio - Pro Rally Teamster #3
- Steve Beauchamp - Pro Rally Teamster #4
- Alfred Sauchelli, Jr. - Trucking Company Owner
- Joe Giorgio - Local 326 Truck Driver
- Diana Agostini - Ice Cream Shop Patron #1
- Lauren Aparicio - Ice Cream Shop Patron #2
- Kelley Rae O'Donnell - Ice Cream Shop Staff #1
- John Garrett Greer - Ice Cream Shop Staff #2
- Jack Caruso - Swanson's Booking Detective
- John Scurti - Bertram B. Beveridge
- Thomas J. Jenkins - Nashville Court Clerk
- Steve Witting - Judge William Miller
- Luke Smith - Reporter
- Brent Langdon - Judge Frank Wilson
- James D. Forsha - Tony Pro's FBI Agent #1
- Giacomino J. Matra - Tony Pro's Guy #1
- Paul Pearlman - Tony Pro's Guy #2
- Frank L. Messina - Tony Pro's Guy #3
- Cilda Shaur - Colombo's Wife
- Dominick LaRuffa Jr. - Colombo's Son #1
- Erick Zamora - Colombo's Son #2
- Joe Caniano - Copa Guest #2
- Lou Martini Jr. - Copa Guest #3
- Michael Bottari - Copa Guest #4
- John Bianco - Copa Guest #5
- Margaret Anne Florence - Gallo's Wife - Sina
- Siena Marino - Gallo's Daughter - Lisa
- Lori Arkin - Gallo's Sister - Carmella Fiorello
- Nicholas Chrysan - Pete the Greek
- Samantha Coppola - Pete the Greek's Girlfriend
- Logan Crawford - Reporter at Prison
- Jeff DeHart - President Nixon
- Mark Fairchild - Attorney General Mitchell
- Matt Walton - TV Host - Moderator
- Peter Jay Fernandez - NAACP President Cecil Moore
- Stephen Mailer - District Attorney Emmett Fitzpatrick
- Gino Cafarelli - Mayor Frank Rizzo
- Robin Kerbis - Angelo Bruno's Wife
- Lucia Giannetta - Tony Pro's Wife
- Michael Romeo Ruocco - Casino Photographer
- Anne Horak - Golddigger Dancer #2
- Nina Lafarga - Golddigger Dancer #8
- Clark Carmichael - Pilot
- Joseph Russo - Bruno Denzetta
- Jeremy Luke - Marco Rossi
- Barbara Eyland - Guest Dancing at Casino #1
- Tracy J. Everitt - Guest Dancing at Casino #2
- Saint Marino - Wedding Wise Guy #1
- Mario Corry - Wedding Wise Guy #2
- Johnny Potenza - Wedding Wise Guy #3
- Joe Passaro - Wedding Wise Guy #4
- Patrick Borriello - Wedding Wise Guy #5
- Alfred Nittoli - Inmate Alfredo
- David Aaron Baker - Assistant US Attorney
- Stanley Burns - Colonoscopy Doctor
- Bill Timoney - Prosecutor - Frank's 2nd Trial
- Thomas J. McDonald - Deputy Clerk - Frank's 2nd Trial
- Virl Andrick - Judge - Frank's 2nd Trial
- Ernest L. Sanders Jr. - Frank's Orderly
- Bill McHugh - Funeral Priest
- Kevin Kane - FBI Agent #2
- Amelia Brain - Sales Girl at Crypt
- Craig 'Radioman' Castaldo - Man in Wheelchair
- Jacqueline Kennedy - Self (archive footage)
- John F. Kennedy - Self (archive footage)
- Fidel Castro - Self (archive footage)
- Michael Iacono - Bowler (uncredited)
- Dean Ciallella - Italian Rally Supporter (uncredited)
- Vanessa Mitchell - Golddigger Dancer #4
- Tommy Bayiokos - Truck Driver (uncredited)
- Michael Cullum - Juror (uncredited)
- Rick Bolander - Lewisburg Guard (uncredited)
- Shade Rupe - Teamster (uncredited)
- Amanda Kloots - Golddigger Dancer #1
- Ian Zelbo - Brother in Ice Cream Parlor (uncredited)
- Brittany Bigelow - Golddigger Dancer #3
- Madison Eastman - Golddigger Dancer #5
- Purdie Baumann - Golddigger Dancer #6
- Jesse Wildman - Golddigger Dancer #7
- Neil Posner - Jerry Vale Band
- Michael Leviton - Jerry Vale Band
- Bridget Barkan - Jerry Vale Band
- Andrea Weinzierl - Jerry Vale Band
- Richard V. Pagano - Jerry Vale Band
- Nicholas Wight - Jerry Vale Band
- G. A. Aguilar
-
Steven Zaillian
- Martin Scorsese
- Richard Baratta
- Marianne Bower
- Berry Welsh
- Emma Tillinger Koskoff
- Chad A. Verdi
- Robbie Robertson
- Randall Poster
- Marko Costanzo
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