Kevin Costner

Eliot Ness

Sean Connery

Jim Malone

Robert De Niro

Al Capone

Charles Martin Smith

Oscar Wallace

Andy García

George Stone

Richard Bradford

Mike

Jack Kehoe

Payne

Brad Sullivan

George

Billy Drago

Nitti

Patricia Clarkson

Ness' Wife

Vito D'Ambrosio

Bowtie Driver

Don Harvey

Preseuski

Robert Swan

Mountie Captain

Del Close

Alderman

Greg Noonan

Rangemaster

Mike Bacarella

Overcoat Hood

Michael P. Byrne

Ness' Clerk

Larry Brandenburg

Reporter

Chelcie Ross

Reporter

Pat Billingsley

Bailif

Will Zahrn

Defense Attorney

Valentino Cimo

Bodyguard

Joe Greco

Bodyguard

Clem Caserta

Bodyguard

Robert Miranda

Gunned Head

John Barrowman

Street Person (uncredited)

Stephen Burrows

Hoodlum (uncredited)

Eddy Donno

Capone's Hitman (uncredited)

Collin Hymes

Baby in Carriage (uncredited)

Clifton James

District Attorney (uncredited)