Bryan Singer Tweets Behind-the-Scenes X-Men Days of Future Past Picture

Bryan Singer has tweeted the first behind-the-scenes picture from X-Men: Days of Future Past .

And while we knew Patrick Stewart was returning, this Professor X picture-related picture has us pretty excited about the time-travelling possibilities.

Singer's tweet ("Hello old friends #XMen #DaysofFuturePast") shows the young and old Professor X's wheelchairs side-by-side, teasing the inevitable cross-generational meet-up between James McAvoy and Patrick Stewart.

The story, which is widely renowned as one of the X-Men 's greatest comic adventures, introduces the idea of a bleak, dystopian future for Marvel's mutants, in which mutants are hunted to death or incarceration by giant mutant-killing robots known as Sentinels.

As if the franchise's individual casts weren't impressive enough, Days of Future Past is set to star Hugh Jackman, Ian McKellen, Michael Fassbender, Anna Paquin, Jennifer Lawrence, Nicholas Hoult, Ellen Page and Shawn Ashmore, alongside McAvoy and Stewart.

We can't wait.