Robert De Niro is renowned for his Mafia heavies, but in "The Alto Knights," he plays two real-life Mob bosses, Frank Costello and Vito Genovese.

The Alto Knights could be the next big gangster movie, and it includes Robert De Niro's most intriguing new challenge as an actor: playing dual roles.

The legendary actor’s first attempt at a dual role is all gimmick, no substance in director Barry Levinson’s true-life gangster saga written by "Goodfellas" author Nicholas Pileggi.