UPDATE: Rachel McAdams has confirmed to The Wrap that she has officially signed on to star in Marvel’s Doctor Strange.

Doctor Strange already boasts an impressive cast that includes Benedict Cumberbatch, Tilda Swinton and Chiwetel Ejiofor, but Marvel isn’t ready to stop there. In addition to those three Oscar-nominees (with Swinton winning for her role in Michael Clayton), they have also reportedly offered Rachel McAdams a role in the upcoming superhero film.

McAdams, currently starring in Season 2 of True Detective, would play the film’s female lead, according to Heroic Hollywood. Who that character would be is unclear, but assuming it’s a love interest, it could be either Morgana Blessing or Clea. Blessing is a writer who lives in Soho, not far from Strange’s office, and is a writer specializing in the occult. She asked Strange to participate in research for her new book and they fell in love. Clea is the daughter of Prince Orini of the Dark Dimension and has aided Strange in many battles against Dormammu (who is actually her half-brother).

Currently, Cumberbatch has been cast as Dr. Stephen Strange, Swinton as The Ancient One and Ejiofor as Baron Mordo. McAdams’s casting would be the last of the major roles as Doctor Strange ramps up to begin filming in London later this fall.

McAdams can be seen next alongside Jake Gyllenhaal in the boxing drama Southpaw.

Doctor Strange opens in theaters on November 4, 2016.