Romijn kept her lips sealed when asked if she’s read the entire script, noting, “I cannot confirm nor deny that I have read the entire script.” She also admitted she “can’t say” who she’s filmed scenes alongside, but it was a “surreal” experience shooting with some of her original X-Men co-stars with a new, blended cast.

Rebecca Romijn returns as Mystique from the X-Men in “Avengers: Doomsday,” premiering in 2026. Meanwhile, she is filming new episodes for the series “Star Trek: Strange New Worlds.”

X-Men actress Rebecca Romijn is returning to play Mystique after a long gap. At San Diego Comic Con, the actress was asked about her role in the upcoming Avengers: Doomsday when she revealed that the MCU film's script wasn't finished yet.