While Empire were enjoying their visit to the set of Mathew Vaughn's X prequel, they were privy to quite a lot of goings on regarding specific scenes but also got to have a look at the editing suite were the film was in the early stages of being cut together.
One such visit resulted in them being witness to a surprise cameo..
..When we enter, editor Eddie Hamilton is working on a scene featuring a surprise and fun cameo which qualifies as a massive spoiler, and another featuring the great Michael Ironside.
So who could it be? There was talk of Hugh Jackman making an appearance as Wolverine while the movie was being shot on Jekyll Island but that seemed to have been shot down by the movie's producers. Were they just trying to throw us off the scent? I doubt it is Wolverine myself, but it sounds like it IS a character we have seen before in the previous X movies anyway.
Plus, Michael frakking Ironside is in it! That was kept quiet. Now anyone not familiar with some great(and some not so great) action and sci-fi flicks of the 80s may have no idea who Ironside is. He also starred in the original V and more recently Total Recall and Starship Troopers. He generally plays the bad guy so I wouldn't be surprised if he does likewise in First Class.