The character will be played by Filipina actress Mei Melancon, who previously worked with "X-Men 3" director Brett Ratner in "Rush Hour 2."
Word began leaking last week from the Vancouver set that "X-Men 3" would introduce Psylocke, who has had several incarnations in the Marvel comic book series and is best known for her fighting and telepathic skills as well as an ability to transport herself and others through shadows. In the film, she will fight against the X-Men as a member of Magneto's (Ian McKellen) Brotherhood of Mutants.
"X-Men 3" is set to bow May 26, on Memorial Day weekend, via Twentieth Century Fox.