Northstar, one of the X-Men, came out in "Alpha Flight No.106" in 1992, becoming the first openly gay superhero.
According to Sir Patrick Stewart, the new levitating chair that Professor Xavier uses in the film "X-Men: Days of the Future Past" actually worked. It only levitated a few inches off the ground and while Stewart would not reveal how it worked, it's believed magnets were used.
A 12-page telepathic battle between Emma Frost and Charles Xavier that would be set inside of a dream was written in the script of "X-Men: First Class", but was removed after the filmmakers saw a similar concept in "Inception."
Wolverine once survived for 6 months under a glacier by eating strips of his own arm (with his healing factor growing it back).
Deadpool derived his name from the dead pool ran between the inmates of the workshop, where he and other failed government test subject were tortured and experimented upon. The odds of his survival were given as a thousand to one.
Stan Lee wanted to call the team of mutants The 'Merry Mutants'. Marvel changed it to 'X-Men.'
Contrary to her depiction in most movies and TV series, Mystique is not Magneto's second-in-command in the 'X-Men' comics and rarely works with him. In fact, she once even leads a team whose specific mission was to arrest Magento.
Deadpool's healing factor is much more powerful than that of Wolverine or the Hulk. While he can survive a nuclear blast, which Wolverine and the Hulk have also done, Deadpool can reattach his head after decapitation, live in the vacuum of space (though he still wears spacesuits to "look cool"), and claims he can survive being thrown into a supernova.
In 'X-Men: First Class', Jennifer Lawrence's character Mystique morphs into a beautiful model in an attempt to look older and seduce Magneto. This woman is Rebecca Romijn, who portrayed Mystique in the three previous "X-Men" movies.
Wolverine's claws were thought to be completely metal until the mid-1990s, when Magneto used his power to yank all of the adamantium out of Wolverine's body, revealing bone claws underneath. He used his bone claws in the comics for 5 years afterward, until adamantium was eventually rebounded to his skeleton.
X-Men #1, published in 1991 is the world's best selling comic book. It has sold nearly 8.2 million copies.
While working on "X-Men: Days of the Future Past", director Bryan Singer would print out fan art of the film and tape it to the wall of the editing room for inspiration.
At one point, Mystique was intended to reveal she used her shape-shifting powers to father Nightcrawler with Destiny. However, Marvel didn't think that would be appropriate for children, so Azazel became Nightcrawler's father and Mystique his mother.
Unlike his movie counterpart, Cain Marko, also known as The Juggernaut, is not a mutant. He owes his powers (and his sober helmet) to a mystical artifact, The Crimson Gem of Cyttorak. He is also Professor X's stepbrother.
Michael Jackson unsuccessfully lobbied for the role of Professor Xavier in the first 'X-Men' film.
There is a Muslim X-Men character named Dust (real name Sooraya Qadir) who also dons the traditional clothing in the comics. She is a mutant with the ability to transform her body into a malleable cloud of dust.
In Marvel's Earth-616 continuity alone, Jean Grey, a founding member of the X-Men, has died several times.
While filming 'X-Men' movie, director Bryan Singer banned anyone from bringing comics on set, hoping actors won't read any character specifics that would conflict with their portrayals on the screen. Hugh Jackman ignored this and had "Wolverine" comics delivered to his trailer.
Stan Lee did not make a cameo appearance in 'X2: X-Men United' or 'X-Men: First Class', despite it being written into his contracts that he appears in any movie based upon Marvel characters he created.
Twilight actor Taylor Lautner was the first actor to be considered to play Beast in X-Men: First Class. However, Lautner's filming schedule was too full for him to take the role.
In comics, Domino is a skilled, mutant, mercenary, who possesses, the ability to manipulate probability in her favor, giving the effect of incredible luck. After joining with the X-Men, she is currently a member of Cable's new X-Force team.
Hugh Jackman only agreed to cameo as Wolverine in 'X-Men: First Class' because he got to say, "Go f*ck yourself."
Nightcrawler's skin is covered with a layer of indigo fur which helps him blend with shadows.
In 2010, Marvel offered a special Deadpool variant cover of the comic "Siege #3" to any comic book store that would spend in 50 torn off covers of specific 'Blackest Night' comic books, which were published by their rivals at DC.
Nightcrawler is unaware of being in the Brimstone Dimension because of how fast he enters and exits. He guides himself through the Brimstone Dimension by an unconsious, natural direction-finding sense.
Magneto of the Ultimate Universe has the Ten Mutant Commandments tattooed on his back.
Nightcrawler, one of the most popular members of Marvel's X-Men, was originally pitched to DC comics, but the character was rejected for being "too weird looking."
Wolverine's first appearance in Marvel Comics was as an antagonist in 'The Incredible Hulk', where he was sent by the Canadian government to kill Bruce Banner.
In "Cable & Deadpool #2", released in January 2007, Deadpool claims that his unmasked face looks like a cross between Ryan Reynolds and a Shar-Pei. Two years later, Reynolds would portray Wade Wilson in the film "X-Men Origins: Wolverine."
X-Men: First Class was originally written to be the prequel film for Magneto in the same vein as 'X-Men Origins: Wolverine'. It would have featured Magneto's early years fighting Nazis as a concentration camp prisoner, described by the writer as 'X-Men' meets 'The Pianist'.
Though it was written in the script for X-Men: Days of Future Past that Wolverine was to wake up in 1973 in his underwear, Hugh Jackman had this changed by claiming that if he were to wake up next to a “really good looking girl”, he wouldn’t be wearing anything.
Gambit of the X-Men has such respect for Deadpool’s fighting abilities that he once paid him off rather than risk battling him, admitting that fighting Deadpool is tantamount to suicide.
While many X-Men characters were considered to play Colossus’ partner in Deadpool, the writers initially settled on Negasonic Teenage Warhead just because they liked her name.
Rob Liefeld and Fabian Nicieza, both fans of the 'Teen titans' comic series, created Deadpool for "New Mutants #98" while acknowledging his resemblance to the DC villain Deathstroke. They even named him Wade Wilson as an in-joke to Deathstroke's alter ego, Slade Wilson.
The 'X-Men' comic series was originally considered a second-tier title by Marvel and was even canceled in 1969. The series didn't gain popularity until after it was rebooted in 1976, featuring a mostly new team that included Storm and Wolverine.
Gambit was originally created to be an "X-Men" villain, working to destroy the team from within.
Deadpool occasionally wears yellow panties underneath his uniform that were once a part of Jean Grey's former 'X-Men' costume.
Deadpool once killed a man just because he believed the Star Wars prequels were better than the original trilogy.
Wolverine is only 5'2'', but his metal skeleton makes him weigh in at 300 pounds, giving him a BMI of 55 or "extremely obese."
Magneto had the number 214782 tattooed on his arm during the Holocaust. Because this couldn’t have been a legitimate Auschwitz number, it was later retconned to 24005.
Storm was once married to Black Panther but their marriage was annulled after Avengers vs. X-Men conflict.
Director Bryan Singer constantly fought with Storm actress Halle Berry while filming X2. At one point, after shooting had run late, Berry marched off set, telling Singer, "You can watch my black a*s while i walk out of here."
Deadpool once formed a team with a version of himself from alternate realities. This included a beheaded zombie Deadpool, a lady Deadpool, a kid Deadpool and a dog Deadpool.
The famously immortal and violent anti-hero Deadpool is afraid of cows.
Tim Miller came up with an idea to have a scene at the end of the credit for Deadpool to have Beast being caught taking a dump on Deadpool's lawn. Nicholas Hoult was ready to shoot the scene but they couldn't find time to shoot it.
As the original 'X-Men' comic series was created in the 1960s, when the civil rights movement was at its peak, Professor X and Magneto were modeled after Martin Luther King Jr. and Malcolm X, respectively.