Bower is no stranger to the world of fantasy, having previously starred in the "Twilight" and "Harry Potter" franchises and a since-canceled "Game of Thrones" prequel.

Marsan's career spans over 120 movies, including Deadpool 2, Mission Impossible 3, Atomic Blonde, Back to Black, and Sherlock Holmes. The actor also played Terry Donovan, the brother to the titular hitman, across eight seasons of the hit drama Ray Donovan.

The Rings of Power just picked up two big stars for Season 3 — Stranger Things‘ Jamie Campbell Bower and Ray Donovan’s Eddie Marsan. Bower is about to conclude his tenure as the big bad in Hawkins, Indiana,