Brian Cox is the latest actor to join the cast of X-Men 2 as villain William Stry.
Other new additions to the sequel include Kelly Hu, Aaron Stanford and Alan Cumming.
Patrick Stewart, Hugh Jackman and Halle Berry are among the original cast returning to reprise their roles.
As well as the characters from the first film, the sequel will include Colossus, Jubilee, Kitty Pryde, Siryn, Pyro, Iceman, Nightcrawler, Beast and Gambit.
All the characters are good and work for Dr Xavier.
Filming on X-Men 2 is currently underway in Canada and the film is due to be released next year.