Vin Diesel tested his look as real-life mobster GIACOMO 'FAT JACK' DiNORSCIO (corr) on pal Steven Spielberg and the movie mogul had no idea who he was. Diesel spent two hours in the make-up chair to achieve his look as the mafia boss in new film FIND ME GUILTY - and decided to see whether his makeover was authentic by visiting Spielberg, who directed him in Saving Private Ryan, on the set of War of the Worlds, which was shooting nearby. Diesel recalls, "Sidney Lumet (director) and I walked across to their set and Steven had no idea who I was. It was very, very funny."