The details was reported by Bleeding Cool and are some of the first to be confirmed regarding the film's plot.
Perhaps the biggest revelation is that the film will be set in the 1960s during JFK's presidential reign, and will feature traditional comic book costumes rather than the leather jumpsuits worn in the original X-Men movies.
Professor Xavier, to be played by Shameless alumnus James McAvoy, will appear both before and after he becomes paralyzed and will have hair due to his younger age in the film.
Singer also revealed that X-Men mainstays Cyclops and Jean Grey won't be appearing in First Class, but that Cyclops's brother Havok will appear instead.
Kevin Bacon was previously announced to be appearing as the film's villain, and Singer has now revealed that he will be portraying Hellfire Club Black King Sebastian Shaw, with January Jones playing his White Queen Emma Frost.
Singer confirmed that while the new film takes from the X-Men: First Class comic series in name, it doesn't follow much of the same tone or storyline.
X-Men: First Class is due to be released in cinemas on June 3, 2011.