X-Men: Days of Future Past is a 2014 American superhero movie based on the fictional X-Men characters that appear in Marvel Comics. Directed by Bryan Singer, it’s the seventh installment of the X-Men movie series and acts as a sequel to both 2006’s X-Men: The Last Stand and 2011’s X-Men: First Class. Take a look below for 30 more fun and interesting facts about X-Men: Days of Future Past.

1. The story, which was inspired by the 1981 Uncanny X-Men storyline “Days of Future Past” by Chris Claremont and John Byrne, focuses on two periods, with Wolverine traveling back in time to 1973 to change history and prevent an event that results in doom for both humans and mutants.

2. The movie features an ensemble cast, including Hugh Jackman, James McAvoy, Michael Fassbender, Jennifer Lawrence, Halle Berry, Anna Paquin, Ellen Page, Peter Dinklage, Ian McKellen, and Patrick Stewart.

3. Simon Kinberg wrote the screenplay from a story he conceived with Jane Goldman and Matthew Vaughn.

4. During its theatrical run, the movie earned over $747 million worldwide, making it the sixth highest grossing movie of 2014, as well as the second highest grossing movie in the series behind Deadpool.

5. The movie received an Academy Award nomination for Best Visual Effects, making it the first X-Men movie to be nominated for an Oscar.

6. According to Peter Dinklage, Bryan Singer picked him to play Bolivar Trask because of his height, stating, “With my Dwarfism, I’m a bit of a mutant. I can’t move metal or anything, but I thought of it as self-loathing. Deep down, Trask is quite sensitive about that aspect of himself.”

7. The script called for Logan to wake up in 1973 in boxer shorts. Hugh Jackman vetoes this, in favor of waking nude, saying, “In Australia, if you’re next to a really good-looking girl, you’re not getting out with boxer shorts on, or briefs, or anything!”

8. Including his cameo in X-Men: First Class, X-Men: Days of Future Past is Hugh Jackman’s seventh portrayal of Logan, which raised his own record for the most times a comic book character has been played by the same actor in theatrical films. Jackman is also the only actor to appear in the entire X-Men film franchise.

9. The original “Days of Future Past” comic mentioned time travel from the year 2013, the same year in which filming began. In the movie, the future action is implied to take place in 2023.

10. When Wolverine wakes up in the past, the woman in bed with him calls him Jimmy. According to the comics and later movies, Wolverine’s name at birth was James Howlett, as his birth father was Thomas Logan, he inherited that surname.

11. According to Bryan Singer, he would only get the movie started with confidence, once Hugh Jackman, Patrick Stewart and Ian McKellen agreed to return.

12. Young Xavier tells Logan to “fuck off.” This was the original scripted line for Hugh Jackman’s cameo in X-Men: First Class. However, Jackman instead improvised the, “Go fuck yourself,” line.

13. Originally, Josh Helman was going to be cast as a young Cain Marko, or Juggernaut. However, Juggernaut was written out of the movie, and Helman was offered the role of a young William Stryker.

14. Halle Berry’s role as Storm had to be substantially reduced, due to her pregnancy.

15. Quicksilver’s slow motion sequence was filmed with mostly practical visual effects, such as high speed photography and stunt rigs, with CGI used only for the objects in mid-air.

16. Although Anna Paquin’s screentime is only three seconds, and she has no lines, she still was one of the top billed cast members during the ending credits. The Extended Cut of the movie, however, restores a subplot, in which she’s featured prominently.

17. Patrick Stewart and Ian McKellen had makeup applied to look 20 years older than their actual age. They had previously had digital makeup applied to look 20 years younger in X-Men: The Last Stand.

18. According to Bryan Singer, he had a two hour discussion with James Cameron, about how to make the time-travel concept feasible and workable within the movie. The concepts the two discussed included quantum physics, alternate universes and string theory.

19. An older version of Ink is visible in the Mutant Internment Camp scene early in the movie. He’s accompanied by an older version of Sabretooth.

20. A life-size model of a 1973 Sentinel robot was constructed for filming.

21. For her role as Mystique, Jennifer Lawrence wore a special bodysuit. She had previously worn full-body prosthetics in X-Men: First Class, but found that too uncomfortable.

22. Bryan Singer liked the painting in Trask’s office, and bought it after filming was complete.

23. Bryan Singer based Bolivar Trask on Adolf Hitler. He said, “As Hitler used the Jews as a scapegoat to bond the darker parts of Europe, he’s doing the same thing with mutant. But he wasn’t a six foot, perfect blond Aryan. He was a short, funny looking fellow!”

24. The release of the teaser trailer for the movie ignited such interest that Bryan Singer made the unprecedented move of recording an actual commentary track to it the following day, explaining the significance of certain scenes and offering more insight into what to expect from the movie.

25. At the beginning of the movie, as the mutants and humans march down the corridor, a quick glimpse is shown of an older Quicksilver from behind. He’s directly in the center of the frame, and is easy to spot with the same hairstyle and hat his younger self has in the movie.

26. X-Men: Days of Future Past is the first X-Men movie where Professor X wears something other than his trademark suit. Bryan Singer felt it wouldn’t work for the Professor to have a suit in an apocalyptic future.

27. A romantic subplot between Storm and Wolverine in the future was filmed, but cut for runtime purposes.

28. Stan Lee was offered a cameo, but opted out, so he could attend Fan Expo Canada in Toronto.

29. During Magneto’s fight with the Presidential guards, there’s a painting behind him. This painting is Eugene Delacroix’s “Liberty Leading the People,” made to commemorate the 1830 French Revolution, and a symbol of rebellion.

30. When Xavier is seen sitting in his plane rubbing his leg, the reflection on the table surface resembles his older self.