Jason Patric
— Detective Reed
Milo Gibson
— Al Capone
Peter Facinelli
— George 'Bugs' Moran
Jamie-Lynn Sigler
— Lulu Rolfe
Sean Faris
— Jack McGurn
Mark Rolston
— Dion O'Banion
Michael Paré
— O'Connor
Al Sapienza
— Johnny Torrio
Don Harvey
— Detective Landa
Sean Kanan
— Detective Boyle
Jason Brooks
— Agent Wilson
Ryan Kiser
— Peter Gusenberg
Joe Coffey
— Drucci
Stephen Brown
— Granata
Louis Fasanaro
— Alberto Anselmi
Jean Kauffman
— Josephine Demory