25th Hour

Lots of six degrees of separation in this movie: On-screen father and son Brian Cox and Edward Norton have both appeared in films with the Hannibal Lecter character: Cox played Lecter in Manhunter (1986), while Norton played Will Graham in that movie's remake, Red Dragon (2002). Philip Seymour Hoffman also appeared in Red Dragon (2002) as reporter Freddy Lounds. Also, Edward Norton's character mentions about wanting to be the "girl in 'X-Men', the one that can walk through walls". Co-stars Anna Paquin, Brian Cox, Aaron Stanford and Dania Ramirez have all starred in various X-Men movies, as Rogue, General Stryker, Pyro, and Callisto respectively. The girl who can walk through walls is called Shadowcat.