As usual, Singer let everyone know about the casting via his Twitter:
“Officially like to welcome #PeterDinklage from #GameOfThrones to #XMEN #DaysofFuturePast Very very excited!”
Dinklage joins a plethora of actors from past X-Men films, including James McAvoy, Michael Fassbender, Jennifer Lawrence, Nicholas Hoult, Ian McKellan, Patrick Stewart, Hugh Jackman, Anna Paquin, Shawn Ashmore and Ellen Page.
The movie is based on the comic of the same name by Chris Claremont.
X-Men: Days of Future Past hits theatres July 18, 2014.