Peter Dinklage tapped for X-Men?

Bryan Singer is continuing to make some bold decisions regarding X-Men: Days of Future Past and he isn't really hiding it. Singer announced via Twitter that he has tapped Peter Dinklage (Game of Thrones) for a key role in the film. There is no word on exactly what role this is. Dinklage is joining several cast members who have a pretty solid history with the X-Men movies thus far so it should be