If actress Pom Klementieff was too cryptic last week with her tease of a classic "Avengers" cover, the "Guardians of the Galaxy Vol. 2" star now makes everything crystal clear: Mantis appears in "Avengers: Infinity War."

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On Saturday Klementieff posted a photo of herself wearing a knit cap emblazoned with the logo of the Marvel Studios sequel, Stwhich kicked off production Jan. 23 at Atlanta Pinewood Studios.

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A photo posted by Pomin8r (@pomin8r) on

Located in Fayetteville, Georgia, that studio complex should by now be familiar to fans of the Marvel Cinematic Universe, as it was used for “Ant-Man,” “Captain America: Civil War,” “Guardians of the Galaxy Vol. 2” and “Spider-Man: Homecoming.” "Black Panther" is filming there at the same time as "Infinity War."

Klementieff, whose credits include Spike Lee's remake of "Oldboy," debuts in "Guardians of the Galaxy Vol. 2" as Mantis, an empath who was raised by Star-Lord's father, the ancient cosmic being known as Ego. The character's backstory in the film differs from her comic book origin, where she's an Earthling raised by the alien Kree sect the Priests of Pama, who believed she was destined to become the Celestial Madonna.

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Although Marvel Studios has yet to make an official announcement about the start of principal photography on "Infinity War," or its cast, we know the sprawling ensemble includes Robert Downey Jr., Mark Ruffalo, Chris Pratt, Jeremy Renner, Benedict Cumberbatch, Brie Larson, Josh Brolin, Karen Gillan and Zoe Saldana. However, they're only for starters, as the film draws in most of the key players from all corners of the Marvel Cinematic Universe.

Written by Christopher Markus and Stephen McFeely ("Captain America: The Winter Soldier"), "Infinity War" is expected to be the culmination of the subplots involving Brolin's Thanos and the Infinity Stones that have been threaded through many of the Marvel films for years.

Directed Joe and Anthony Russo (“Captain America: The Winter Soldier,” “Captain America: Civil War”), "Avengers: Infinity War" arrives May 4, 2018, followed by an as-yet-untitled sequel on May 3, 2019. Before that, however, fans will see Klementieff's debut as Mantis in "Guardians of the Galaxy Vol. 2," in which she appears alongside Chris Pratt, Zoe Saldana, Dave Bautista, Vin Diesel, Bradley Cooper, Michael Rooker, Karen Gillan, Sean Gunn, Glenn Close, Elizabeth Debicki, Chris Sullivan and Kurt Russell. Written and directed by James Gun, the film opens May 5.