Jason Patric as Detective Reed

Milo Gibson as Al Capone

Peter Facinelli as George 'Bugs' Moran

Jamie-Lynn Sigler as Lulu Rolfe

Sean Faris as Jack McGurn

Mark Rolston as Dion O'Banion

Michael Paré as O'Connor

Al Sapienza as Johnny Torrio

Don Harvey as Detective Landa

Sean Kanan as Detective Boyle

Jason Brooks as Agent Wilson

Ryan Kiser as Peter Gusenberg

Joe Coffey as Drucci

Stephen Brown as Granata

Louis Fasanaro as Alberto Anselmi