Prepare For The Apocalypse: 21 Things You Didn't Know About X Men: Days Of Future Past!

Wolverine was meant to wake up in 1973 wearing boxers but Hugh Jackman vetoed that idea. In Australia, they wake up in nothing!

Storm was meant to have a greater role in the movie, but due to Halle Berry's pregnancy it had to be significantly cut down.

Ian McKellen and Patrick Stewart were touring a production of waiting for Godot when they got offered roles in the film. They were both thrilled!

This movie was Jackman's 7th appearance as Wolverine, setting a record for the series. He's also the only actor to have appeared in all movies.

Filmmakers chose this story line specifically because it allowed them to revamp the whole series.

The woman Wolverine wakes up with calls him 'Jimmy'-in the comic books his real name is James Howlett, his fathers last name is Logan.

In the comics other Marvel heroes are wiped out by the sentinels including Spiderman, Iron Man, The Hulk, and The Fantastic Four.

The "future" action of the movie is implied to be the year 2023.

According to Director Bryan Singer, he could direct the film with confidence once Jackman, McKellan, and Stewart all signed on.

Young Xaviar told Logan to F*** Off-the same line Logan was meant to cameo with in First Class, but Jackman improvised, 'Go F*** Yourself.'

Days of Future Past was Patrick Stewart's sixth appearance as Professor X.

Peter Dinklage was cast for the role because, also a dwarf, he understood Trask's insecurities more than anyone else ever could.

Singer based the time travel on String Theory, which is an actual scientific theory that might make time travel possible.

In "First Class" Jennifer Lawrence wore prosthetics, but switched to a body suit for Future Past because it was so uncomfortable.

This was the first of the series to be nominated for an Oscar for Visual Effects.