Tom Hiddleston's black hair has returned. Which means only one thing: Loki is ready to return to his mischiefs. Marvel Studios has roped in the British actor to reprise the role of God of Mischief for a Disney Plus series on Loki. The series was teased in Avengers: Endgame and eventually confirmed by the studio last summer. While Hiddleston has been tight-lipped about the series, he recently uploaded a video on his Instagram to announce he's returned to the studio to prepare for his role.