Yep, it’s official. Jessica Chastain will oppose the X-Men in Dark Phoenix, which is currently in production in Montreal. The actress shared two Instagrams of herself and James McAvoy, a.k.a. Charles Xavier, from what’s probably The Disappearance of Eleanor Rigby’s red carpet and a screencap from that movie itself. She won’t say who she’s playing in Dark Phoenix, but we might know already.