Michael Shannon

as Richard Kuklinski

Born 08/07/1974, age

Winona Ryder

as Deborah Kuklinski

Born 10/29/1971, age

Ray Liotta

as Roy Demeo

Born 12/18/1954

Died 05/26/2022, age

Chris Evans

as Robert Pronge

Born 06/13/1981, age

David Schwimmer

as Josh Rosenthal

Born 11/02/1966, age

James Franco

as Marty Freeman

Born 04/19/1978, age

Stephen Dorff

as Joey Kuklinski

Born 07/29/1973, age

Robert Davi

as Leo Marks

Born 06/26/1951, age

McKaley Miller

as Anabel

Born 05/14/1996, age

Erin Cummings

as Ellen

Born 07/19/1977, age

Christa Campbell

as Adele

Born 12/07/1972, age

Gavin Casalegno

as Roller Skater (uncredited)

Born 09/02/1999, age