Emmy nominee Braun is set to play Derrek, Stefani's boyfriend who grows more and more frustrated with her increasingly dangerous life. Braun, of course, is best known for playing Cousin Greg on Succession, although he's been working steadily on TV and in movies for the past 20 years. Other notable roles include playing Cameron (the Joseph Gordon-Levitt role) in the TV adaptation of 10 Things I Hate About You and a playful appearance as the Albino in last year's The Princess Bride socially-distanced reenactment.