The much-lauded X-Men series, Legion, is ending with its third season, but that’s not stopping them from going out with a bang. Showrunner, Noah Hawley, has tweeted that the show will introduce two major characters: Professor Charles Xavier and Gabrielle Haller, the parents of David Haller. British actor, Harry Lloyd (Game of Thrones) has been cast as Professor X, while Stephanie Corneliussen (Mr. Robot) will portray Gabrielle.
In the comics, Professor X met Gabrielle while working at a mental hospital with Magneto. The two grew close after Xavier drew her out of her catatonic state, eventually having a child together. That child would eventually grow to become most powerful mutant on Earth, Legion.