Source: Warner Bros Studios / HBO
Harry Potter and the Prisoner of Azkaban
Bronson John Webb played Pike one of Draco Malfoy’s friends from the Slytherin house. You can see him in the scene at Hogsmeade near the Shrieking Shack.
In Game of Thrones, he was in the very first episode, as a deserter of the Night’s Watch. He eventually gets his head lopped off by Nedd Stark.
Since Game of Thrones, he has been on the TV series The Aliens and was even in Rogue One: A Star Wars Story as a Rebel MP.