Professor Charles Xavier is making his way to the small screen for the first time ever. At least in live-action. It's been announced that Harry Lloyd will portray the iconic mutant in Legion season 3 on FX. The network recently announced that the series will be ending with its third season, but they clearly intend to go out with a bang.

The announcement was made by series creator Noah Hawley, who revealed that the former Game of Thrones star will portray Professor X, becoming the first person to do so on live-action television. It's also been announced that Stephanie Corneliussen, known for her work on Mr. Robot, will play a character named Gabrielle. They just so happen to be the parents of the show's lead character David Haller in the pages of Marvel Comics. The official Legion Twitter account revealed the news with the following statement.

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"Noah Hawley is pleased to announce two guest castings for the final year of Legion. Stephanie Corneliussen will play David Haller's mother, 'Gabrielle,' and Harry Lloyd will play his father, 'Professor X.'

Legion centers on David Haller, portrayed by Dan Stevens, a man who has spent his life thinking that he's schizophrenic, only to discover that he may actually be the most powerful mutant in the world. There have been references to Professor X in the series previously, but he's never actually been brought into the fold. Noah Hawley says that Harry Lloyd will make his debut as the founder of the X-Men and, more importantly as it related to the show, David's father, in season 3's third episode. It hasn't yet been revealed when Gabrielle will come into the picture.

Harry Lloyd is best known for his work on the first season of Game of Thrones as Viserys Targaryen. He was killed off and has since moved on to other projects and, most recently, has been starring alongside J.K. Simmons on Counterpart. On the big screen, Charles Xavier has been portrayed by Patrick Stewart and James McAvoy. As such, Lloyd has some big shoes to fill. Stephanie Corneliussen, aside from Mr. Robot, has also starred on Deception and Legends of Tomorrow as Valentina Vostok. At the present time, it isn't clear how big either of their roles will be on the upcoming season, or how exactly they'll factor into the larger story.

FX has decided to end Legion after this upcoming season amidst a decline in ratings from season 1 to season 2, and as Disney gets ready to complete the merger with Fox, which will put them in control of the X-Men franchise in the future. However, the network made it clear that Noah Hawley had originally envisioned the series as a three-season arc and they're simply sticking to that plan. That means we're going to get a proper conclusion to the show, rather excitingly, that conclusion is going to include Professor X. Legion season 3 is set to debut in June. Feel free to check out the announcement from the Legion Twitter account below.