Kevin Costner as Eliot Ness

Sean Connery as Jim Malone

Robert De Niro as Al Capone

Charles Martin Smith as Oscar Wallace

Andy García as George Stone

Richard Bradford as Mike

Jack Kehoe as Payne

Brad Sullivan as George

Billy Drago as Nitti

Patricia Clarkson as Ness' Wife

Vito D'Ambrosio as Bowtie Driver

Steven Goldstein as Scoop

Peter Aylward as Lt. Anderson

Don Harvey as Preseuski

Robert Swan as Mountie Captain

John J. Walsh as Bartender

Del Close as Alderman

Colleen Bade as Mrs. Blackmer

Greg Noonan as Rangemaster

Sean Grennan as Cop Cousin

Larry Viverito Sr. as Italian Waiter

Kevin Michael Doyle as Williamson

Mike Bacarella as Overcoat Hood

Michael P. Byrne as Ness' Clerk

Kaitlin Montgomery as Ness' Daughter

Aditra Kohl as Blackmer Girl

Charles Keller Watson as Reporter

Larry Brandenburg as Reporter

Chelcie Ross as Reporter

Tim Gamble as Reporter

Pat Billingsley as Bailif

Sam Smiley as Bailiff

John Bracci as Fat Man

Jennifer Anglin as Woman in Elevator

Eddie Minasian as Butler

Anthony Mockus Sr. as Judge

Will Zahrn as Defense Attorney

Louie Lanciloti as Barber

Vince Viverito as Bodyguard

Valentino Cimo as Bodyguard

Joe Greco as Bodyguard

Clem Caserta as Bodyguard

Bob Martana as Bodyguard

Joseph Scianablo as Bodyguard

George S. Spataro as Bodyguard

Melody Rae as Union Station Woman

Robert Miranda as Gunned Head

James Guthrie as Pagliacci

Basil Reale as Hotel Clerk

John Barrowman as Street Person (uncredited)

Jimmy Borto as Court Reporter (uncredited)

Stephen Burrows as Hoodlum (uncredited)

Ernest Capponi as Gangster at Round Table (uncredited)

Justin De Rosa as Capone's Hitman (uncredited)

Eddy Donno as Capone's Hitman (uncredited)

Jack Fitzstephens as Train Announcer (uncredited)

Collin Hymes as Baby in Carriage (uncredited)

Clifton James as District Attorney (uncredited)

Matt Johnston as Union Station Bodyguard (uncredited)

Robert Minkoff as Man (uncredited)

William Rossman as Gangster (uncredited)