UPDATED: 'X-Men: First Class' Cast Announcements

UPDATED 15/07/2010:
Kevin Bacon has joined the film in a role that is being kept secret, he is expected to play the villain in the movie.

Another cast announcement was also made today, Jennifer Lawrence will portray Mystique.

Aaron Johnson, Nicholas Hoult, Lucas Till, Alice Eve and Caleb Landry Jones have all been announced as cast members in Matthew Vaughn's X-Men origins film. The cast will join the earlier announced James McAvoy and Michael Fassbender who will play Professor X and Magneto respectively.

Aaron Johnson (Nowhere Boy, Kick-Ass) will reunite with director Vaughan as Scott Summers aka Cyclops. Nicholas Hoult (Skins, About A Boy) has been given the role of the young Hank McCoy aka Beast. Lucas Till (Walk The Line,Battle: Los Angeles) looks to be penciled in to play Scott's younger brother Alexander Summer aka Havok. Alice Eve (Big Nothing, She's Out of My League) has signed to portray Emma Frost and Caleb Landry Jones (No Country For Old Men, Social Network) has been given the part of Banshee.

Banshee's power is a sonic scream that harms hearing and causes sonic vibrations. The Irish mutant's real name is Sean Cassidy. He also has the ability to fly and hover at the speed of sound.

Emma Frost possesses telepathy abilities matching those of Charles Xavier.

Havok is a mutant possessing the power to absorb ambient cosmic energy, process it and emanate it from his body as waves of energy that heat the air in the path, turning it into plasma in the form of a blast or discharge, with a tell-tale concentric circle pattern. These waves will emanate from his body in all directions unless he purposefully tries to channel them in a single direction, usually along the length of his arms. This results in control over an extremely powerful sort of destructive force.

Beast has superhuman physical strength and agility. Throughout his history, the character undergoes various transformations, taking on such animal characteristics as blue fur and feline facial features.

Cyclops mutant ability is to project a powerful beam of concussive, ruby-colored force from his eyes.

Mystique is a mutant shape-shifter with the ability to psionically shift the formation of her biological cells at will to change her appearance and thereby assume the form of other humans. She can also alter her voice to duplicate exactly that of another person.