Interstellar and Zero Dark Thirty star Jessica Chastain is finally going to be ticking the superhero movie box off her CV, as she has confirmed that she has signed up for X-Men: Dark Phoenix.

On her Instagram page, the actress shared an image of her and James McAvoy – who plays Professor Charles Xavier in the films – and writes that she's off to join the cast in Montreal.

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The actress also captioned the photo "I'm gonna make you cry so hard", which could give us a hint as to who she's playing.

Rumours have stated that the filmmakers were looking to cast Chastain as Princess Lilandra of the Shi'ar Empire, and while she hasn't confirmed this, it's looking likely.

In the comics (and nineties animated series) Charles and Lilandra are in love, but their duties and very long distance gets in the way of their relationship – hence her comment about making Charles cry.

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The upcoming film is set to follow the iconic Dark Phoenix Saga storyline from the comics, which sees Jean turn into a giant firebird who saves the universe, then turns evil and starts eating planets.

The X-Men join up with a gang of space pirates, and there's the aforementioned intergalactic empire in the mix too.

It's very eighties, and while it works wonders in the colourful comics and cartoons, we're worried it's a few steps too far away from the lower key science fiction the film series has established.

The Last Stand had the right idea, is what we're saying.

From: Digital Spy