The official trailer for the movie X2: X-Men United (2003) Following a shocking attack on the President, the X-Men must stand united with their deadliest enemies to combat a menace that threatens every mutant on the planet - and possibly all of mankind. Starring: Hugh Jackman Halle Berry Patrick Stewart Anna Paquin Shawn Ashmore Ian McKellen Bruce Davison Famke Janssen James Marsden Rebecca Romijn-Stamos Alan Cumming Brian Cox