Warning: This article contains spoilers for Captain Marvel, which is set to hit theaters on March 8.

Even though the release of Captain Marvel is a just a few weeks away, the latest entry in the Marvel Cinematic Universe is still surrounded by mystery. However, Annette Bening revealed the answer to one of the movie's many lingering questions during an interview on The Late Show with Stephen Colbert.

After briefly teasing Colbert about the secrecy around the movie, Bening confirmed that she was playing the Supreme Intelligence in the film.

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Like her comic book counterpart, Bening's Supreme Intelligence is the leader of the Kree Empire and the collective embodiment of the greatest minds that intergalactic alien empire has ever produced.

In the Marvel Universe, the Supreme Intelligence was created by Stan Lee and Jack Kirby in 1967's Fantastic Four #65. The Supreme Intelligence is an artificial intelligence that rules the Kree and stands as one of the most prominent leaders in Marvel's cosmos. While the Supreme Intelligence is usually just a giant green head, Bening apparently gives it a more humanoid form in the film.

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The interview also included a clip from the movie, where Bening is explicitly identified as the Supreme Intelligence in a conversation with Brie Larson's Carol Danvers as they discuss the threat of the Kree's mortal enemies, the shape-shifting Skrulls.

Directed by Anna Boden and Ryan Fleck, Captain Marvel stars Brie Larson as Carol Danvers, Samuel L. Jackson as Nick Fury, Jude Law as the commander of Starforce, Clark Gregg as Phil Coulson, Lee Pace as Ronan the Accuser, Djimon Hounsou as Korath the Pursuer, Gemma Chan as Minn-Erva, Ben Mendelsohn as Talos, Lashana Lynch as Maria Rambeau, Algenis Perez Soto as Att-Lass, McKenna Grace as a young Carol Danvers and Annette Bening as the Supreme Intelligence. The film arrives on March 8.