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Carrie Coon is Watch Gun Hill OnlineProxima Midnight, one of four members of Thanos's villainous Black Order.

The Leftoversstar obviously isn't just nowjoining Avengers: Infinity War-- a movie that is shot, almost certainly in the can, and speeding toward its April 27 release. But it's news to us.

SEE ALSO: Everything you need recapped about the Marvel Cinematic Universe before 'Avengers: Infinity War'

Confirmation comes from no less a reliable source than the sibling filmmakers behind Infinity War. Anthony and Joe Russo revealed Coon's involvement and role during a recent interview with Radio Times.

You can get a glimpse of Proxima Midnight in this July 2017 tweet from Marvel Studios co-president Louis D'Esposito, in which he referred to the Black Order as the "Children of Thanos." She's the second one from the left.

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There's no familial relationship between Thanos and his Black Order cronies in the comics, but perhaps that's changing in the upcoming movie.

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Proxima Midnight of the comics is married to her fellow Black Order tough guy, Corvus Glaive (far left in the photo above). She wields a spear forged by Thanos out of -- I'm pulling this next bit from the wiki, because LOL -- "a sun trapped in distorted space-time, acting and operating as a star, supernova, and black hole at once."

When she throws it, the spear's innate power means it never misses its target, and said target is left immobilized on contact. The tip is also coated in a lethal toxin that's capable of killing any living matter on contact. It's even been known to knock the Hulk back to his human Bruce Banner form.

When Thanos invades Earth with the Black Order at his side in the comics, Proxima Midnight is sent to Atlantis to recover the Time Gem -- one of the six Infinity Gems -- from Namor, the undersea city's king.

Expect Infinity Warto take her in a different direction. The Time Stone is currently in Doctor Strange's possession, and trailers have suggested that he'll be matching wits with another member of the Black Order, Ebony Maw (as he did in the comics!).

How Proxima Midnight factors into the movie isn't clear. The clearest glimpse we've had of her came during the Nov. 2017 Infinity Wartrailer, during which there's a brief shot of what looks like her spear making contact with the Infinity Stone in The Vision's forehead (causing him tremendous pain).

Trailers can be deceiving, however. All we really know from this new revelation is that Coon lends her voice, at the very least, to the Black Order's only female member. All will be revealed soon enough, as Avengers: Infinity Warhits theaters on April 27.

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