Michael Shannon

Richard Kuklinski

Winona Ryder

Deborah Kuklinski

Ray Liotta

Roy Demeo

Chris Evans

Robert Pronge

David Schwimmer

Josh Rosenthal

James Franco

Marty Freeman

Stephen Dorff

Joey Kuklinski

Robert Davi

Leo Marks

John Ventimiglia

Mickey Scicoli

Danny A. Abeckaser

Dino Lapron

Ryan O'Nan

Terry Franzo

McKaley Miller

Anabel

Hector Hugo

Tender Bar Earl

Zoran Radanovich

Jimmy

Shira Vilensky

Coffee Shop Waitress

Kelly Lind

Hospital Nurse

John P. Fertitta

Uncle Bill

Erin Cummings

Ellen

Jimmy Lee Jr.

Homeless Man

Johnny Martin

Mareilli

Nick Gomez

Alvaro

Vincent Fuentes

JC

Brian Kinney

Slick BMW Guy

Ashlynn Ross

Alex

Weronika Rosati

Livi

Christa Campbell

Adele

Alexandra Doke

Park Little Girl

Bill Martin Williams

Club Maitre D'

Lindsay Clift

Club USA Dance Partner

Katarzyna Wolejnio

Romy

Jay Giannone

Dominick Provenzano

Freddy Bosche

Detective Beaumont

Tim Bell

Cop

Garrett Kruithof

Stanley Kuklinski

Ray Gaspard

Dennis

Juan Michael Konshuk-Mas

Mr. Freezy's Son

Ehud Bleiberg

Trial Judge

Jonathan Vender

Trial Judge (voice)

Tommy Alastra

Tommy Alastra

Documentary Interviewer (voice)

Gavin Casalegno

Roller Skater (uncredited)

Joy Leigh

Restaurant Patron (uncredited)