- Lola Glaudini - Candida Donadio
- Billy Magnussen - Robert Redford
- Derek Richardson - Mitch Kaufman
- Victoria Garcia-Kelleher - Erika Puzo
- Kyle S. More - Bernie Fein
- Sal Landi - Joe Bonnano
- Marcelo Tubert - Dominic Magnolia
- Matthew Furfaro - Anthony / Punk
- Jake Regal - Arthur Hiller
- Steven Pritchard - Ted
- Joseph Winford Warren - Dave
- Paul Black - Chateau Talent Agent
- Ryan Krause - Johnny Actor
- Paul Gunning - William Paley
- Michael Landes - Vic Damone
- Ross McCall - Special Agent Moran
- Kirk Acevedo - Special Agent Hale
- Louis Mandylor - Mickey Cohen
- Ron Roggé - Jilly Rizzo
- Ted Monte - Anthony Coniglio
- Corrin Evans - Amy
- Dylynn Abbey - Kristy
- Mimi Gianopulos - Sue Mengers
- Patrick Labyorteaux - Murray Miller
- Johnno Wilson - Bartender
- Corey Landis - Stan Kamen
- Nora Arnezeder - Françoise Glaser
- Joe Marinelli - Peter Lovano
- Duncan Bravo - Dr. Karam Singh
- Mark Atteberry - Bill Thompson
- Justin Chambers - Marlon Brando
- James Madio - Carmine Vispiciano
- Danny Nucci - Congressman Mario Biaggi
- Stephanie Koenig - Andrea Eastman
- Emil Beheshti - Surveyor #1
- Brian S. Carpenter - Italian League Reporter #2
- Dawn Joyal - Anna Johnstone
- Jason Boegh - Polo Lounge Maître d
- O'Shay Neal - Jamar Jackson
- Lisa Dobbyn - Morgana King
- Frank John Hughes - Frank Sinatra
- Carmine Giovinazzo - Sonny Grosso
- Michael Gandolfini - Andy Calhoun
- Turhan Troy Caylak - Richard 'Dickie' Dunston
- Maya Butler - Diane Keaton
- Christian Pedersen - Gary Glynn
- Anthony Gruppuso - Mafia Soldier
- Andrew Pickwood - Tea Room Waiter
- Paul McCrane - Jack Ballard
- Geoffrey Arend - Aram Avakian
- Aimee Carrero - Rosie Molina
- Derek Magyar - Robert Duvall
- Max Bennett - Mob Butcher
- John Mariano - Anthony Spirachio
- Lynn Adrianna - Madolina Colombo
- Jennifer Bond - Mary
- Lauren Bond - Lynn
- Anthony Skordi - Carlo Gambino
- Michael Rispoli - Tommy Lucchese
- Joseph Russo - Joe Gallo
- Derrick Baskin - Leroy 'Nicky' Barnes
- Matthew Gottlieb - Phillip 'Benny Squint' Lombardo
- Branden Williams - Gianni Russo
- Zack Schor - Fred Gallo
- Damian Conrad-Davis - James Caan
- Cynthia Aileen Strahan - Talia Shire
- Mark Berry - Agent Richman
- Ian Michaels - Robert Towne
- Kenny Barr - Stunt Coordinator
- Veronica Wylie - Seamstress
- Rio Magdaleno - Salesman
- Jake Cannavale - Caesar Romano
- Lou Ferrigno - Lenny Montana
- Eric Balfour - Dean Tavoularis
- T.J. Thyne - Gordy Willis
- Vito D'Ambrosio - Italian Man
- Juan Antonio Bolivar - Corleone Waiter
- Jonathan Biver - Marketing Executive #1
- Joseph Vassallo - Saro Vitelli
- Allen Marsh - Alvin Sargent
- Sole Bovelli - Simonetta
- Tony Robinette - Eugene Vault
- Sebastiano Pigazzi - Angelo Vitelli
- Johnny Venokur - Mobster #2
- Vincent Giovanni - Bruno
- Chad McCord - Editor
- Meredith Garretson - Ali MacGraw
- Patrick Gallo - Mario Puzo
- Annie Funke - Sheila
- Brandon Sklenar - Burt Reynolds
- Josh Zuckerman - Peter Bart
- Erin Coker - Premiere Reporter #1
- Charlie Farrell - Reporter with Puzo
- Jean-Christophe Febbrari - Jean Leon
- Rick Gifford - Premiere Reporter #2
- Diane Mizota - Studio Reporter #1
- Nick Petroccione - Eddie Kurland
- Dave Shalansky - Henry Kissinger
- Tracy Silver - Bluhdorn's Secretary
- Christian Roberts - Italian League Reporter #3
- Natasha Sill - Nancy
- George Russo - Paul Sciacci
- Michael Tolkin
- John Papsidera
- Miles Teller
- Leslie Greif
- Jim Small
- Albert S. Ruddy
- Isabella Summers
Miles Teller interpreta a Albert S. Ruddy en la serie.
Vito D'Ambrosio interpreta a Italian Man en la serie.
Matthew Goode interpreta a Robert Evans en la serie.
Dan Fogler interpreta a Francis Ford Coppola en la serie.
Burn Gorman hace el papel de Charles Bluhdorn.
Colin Hanks interpreta a Barry Lapidus en la serie.
Giovanni Ribisi interpreta a Joe Colombo en la serie.
Juno Temple interpreta a Bettye McCartt en la serie.
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