The actor who voices the talking tree in Guardians of the Galaxy let it slip that his Marvel superhero team will sprout up in Avengers: Infinity War.
Vin Diesel teased during a Facebook Live video on Friday that the intergalactic do-gooders will be part of the third Avengers movie.
The Infinity War instalment is expected to unite several Marvel characters from across 18 films.
Diesel, the star of Fast & Furious, portrayed extraterrestrial Groot in 2014's Guardians of the Galaxy alongside Chris Pratt, Zoe Saldana and Bradley Cooper.
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Diesel called the planned Avengers mash-up "incredibly exciting."
A spokeswoman for Avengers studio Disney did not immediately respond to a request for comment.
Guardians of the Galaxy Vol. 2 is scheduled to launch in May, 2017, while Infinity War is set for release May, 2018.