Andy Garcia

George Stone

Don Harvey

Preseuski

Robert De Niro

Al Capone

Kevin Costner

Eliot Ness

Brian De Palma

Director

Patricia Clarkson

Catherine Ness

Sean Connery

Jim Malone

Charles Martin Smith

Oscar Wallace

Richard Bradford

Mike

Jack Kehoe

Payne

Brad Sullivan

George

Billy Drago

Nitti

Vito D'Ambrosio

Bowtie Driver

Steven Goldstein

Scoop

Peter Aylward

Lt. Anderson

Robert Swan

Mountie Captain

John J. Walsh

Bartender

Del Close

Alderman

Colleen Bade

Mrs. Blackmer

Greg Noonan

Rangemaster

Sean Grennan

Cop Cousin

Larry Viverito Sr.

Italian Waiter

Kevin Michael Doyle

Williamson

Mike Bacarella

Overcoat Hood

Michael P. Byrne

Ness' Clerk

David Mamet

Writer