New Martin Scorsese film The Irishman has added an additional two Boardwalk Empire stars to its cast alongside the already-confirmed Bobby Cannavale.

Deadline reports that Stephen Graham - who played gangster Al Capone - has been tapped to play Genovese mob boss Tony “Pro” Provenzano opposite Robert De Niro, Joe Pesci and Al Pacino in the latter's first ever Scorsese collaboration.

Provenzano was a top associate of Jimmy Hoffa, the character whose disappearance provides the film with its story. He was believed to have played a part in the mystery with Hoffa's ‘peace conference’ with Provenzano the last time he was ever heard from.