Michael Shannon
Richard Kuklinski
Winona Ryder
Deborah Kuklinski
David Schwimmer
Josh Rosenthal
James Franco
Marty Freeman
Stephen Dorff
Joey Kuklinski
John Ventimiglia
Mickey Scicoli
Danny A. Abeckaser
Dino Lapron
Hector Hugo
Tender Bar Earl
Shira Vilensky
Coffee Shop Waitress
John P. Fertitta
Uncle Bill
Jimmy Lee Jr.
Homeless Man
Brian Kinney
Slick BMW Guy
Alexandra Doke
Park Little Girl
Bill Martin Williams
Club Maitre D'
Lindsay Clift
Club USA Dance Partner
Jay Giannone
Dominick Provenzano
Freddy Bosche
Detective Beaumont
Garrett Kruithof
Stanley Kuklinski
Juan Michael Konshuk-Mas
Mr. Freezy's Son
Jonathan Vender
Trial Judge (voice)
Tommy Alastra
Documentary Interviewer (voice)
Gavin Casalegno
Roller Skater (uncredited)
Joy Leigh
Restaurant Patron (uncredited)
Víctor Quintero
Hanging Corpse