Game of Thrones star Iwan Rheon joins Marvel’s Inhumans Marvel has announced that former Game of Thrones actor Iwan Rheon is set to star in the upcoming series Marvel’s Inhumans. Rheon will play the role of Maximus, brother of the Inhuman King, Black Bolt, who is capable of mind control. In the series, Maximus is a clever and charming Inhuman that is fiercely devoted to the people of Attilan, especially his brother, the King – although he harbors an intense desire to wear the crown himself. “Iwan’s ability to be charming, roguish and still completely unexpectedly dangerous were all the different sides we needed to bring the character to life.