Pom Klementieff (born May 3, 1986) is a French actress born in Quebec, Canada. She studied at the Cours Florent drama school in Paris and has appeared in films such as "Loup" (2009), "Sleepless Night" (2011), and "Hacker's Game" (2015). She has played Mantis in the Marvel Cinematic Universe since "Guardians of the Galaxy Vol. 2" in 2017.
Source: Wikipedia