Adam Driver Cast as Nathaniel Milbury (Mister Sinister) in New Marvel Studios' X-Men Film

Actor Adam Driver has been cast in Marvel Studios' upcoming X-Men film, where he will portray Nathaniel Milbury, identified by entertainment publications as the villain Mister Sinister. The casting was announced during Disney's D23 2026 entertainment showcase. Driver joins a cast that includes Sadie Sink as Jean Grey and Kit Connor as Scott Summers, with the film slated for a May 2028 release.