All the Avengers who were also X-men

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If you’re an avid reader of Marvel comics, then you’re probably aware that the company is home to a plethora of heroes who have been featured in both the X-men and Avengers franchises.

In this post, we’ll be tackling the most famous Avengers who have also been part of Xavier’s School for Gifted Youngsters, showcasing how these talented individuals tipped the scales in most favour one side or another via their abilities and contributions.

So sit back and enjoy our rundown on all your fav favourite superheroes with ties to both universes!

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The Two Universes : 

The Marvel universe is full of superheroes with abilities that seem to be ripped from the pages of a comic book. But, as we all know and marvel at, there are many similarities between the two universes. Some characters were originally written as Marvel characters before being given their franchises. Others were created for DC comics before eventually making their way over to Spiderman’s pen pal and friend, the Avengers.

So If you’re a Marvel comics fan, this is the post for you. Here we’ll be discussing all the Avengers with X-men connections:

What is an Avenger and what is an X-Men?

The Avengers are a team of heroes from Marvel Comics who consist of people with extraordinary abilities and powers, including the ability to fly and shoot energy beams from their hands. The X-Men are a group of superheroes that protect human mutants as well as fight for peace with other species such as Mutates. To be an Avenger, one must have a “superpower” which is one way they’re different from the X-Men.

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Also, this is a definitive list of all the Avengers who were also X-men.

Iron Man: 

Tony Stark was a member of Westchester’s X-factor in an alternate universe.


Thor was once the protector of planet Earth under Professor Xavier’s leadership.  

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Peter Parker regularly attends Xavier’s school and has been battling his arch-nemesis Doctor Octopus who is also a mutant villain in the Marvel universe.  

Captain America: 

Steve Rogers was both an Avenger and Union Jack (a British hero). 

Hulkbuster Armour: 

The Hulkbuster suit worn by Iron Man is designed to fight against fellow AAvengers The Hulk aka Bruce Banner.

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Green goblin:

Green Goblin is also known as Spider-Man’s arch-nemesis and one of his hardest foes.

Napoleon Bonaparte: 

In time, Tony Stark becomes the Emperor of Europe, which is also an alternative version of him in the Earth X series. 

Professor X: 

Professor X is best known as the founder and headmaster of Xavier’s School for Gifted Children and leader to all mutants on Earth in Marvel comics.  

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Magneto was a mentor to young Jean Grey and has a similar character as Professor Xavier but uses more violent means to defend mutant rights.  


Scott Summers aka Cyclops was another member of Professor X’s original X-men. He was the first to die while in battle with the phalanx.


The spider-woman nickname is a homage to a certain Spider-Man villain, who is also an X-Man. 

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Jean Grey: 

In Earth X, James Howlett aka Wolverine also known as Logan aka Professor X’s original protege has been replaced by Jean Grey, who is later killed. 


In this alternate universe, Iceman was not born in Wisconsin and never picked up his powers and joined the team instead he became an assassin for hire. 

Reed Richards: 

Reed Richards is another character who used to be a young genius student of Professor Xavier but was later replaced.

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In conclusion, it is important to learn which heroes have once been a man. The X-men are arguably the most famous superhero team of all because they are a diverse bunch, consisting of mutants with unique powers, and mutants with similar powers. It is for this reason that there are many instances where Marvel characters have been introduced as part of the Avengers team.

There are also a few cases where the protagonists from an X-men movie were chosen to be in another Marvel movie and vice versa. This article covered almost all such instances where an Avenger was also a mutant from their respective superhero teams.