14 Game Of Thrones Actors Who Were Also In Harry Potter
2. David Bradley
In Game Of Thrones
Bradley played Walder Frey, one of the series' most detestable characters. Although introduced as a potential key ally for the Starks, that gradually goes to hell after Robb marries Talisa instead of one of Walder's daughters, leading to him orchestrating the Red Wedding. He then disappeared for a couple of seasons after that, before a grisly return in Season 6 and then 7.
In Harry Potter
Bradley played Argus Filch, one of the series' most detestable characters. The caretaker of Hogwarts, he's perennially in a bad mood and hates students, his sole source of delight coming when he manages to catch them up to no good.
What Else
Though he's been acting since the 70s, it's this century where Bradley has been most prominent on screen. He's made memorable appearances in Broadchurch, Hot Fuzz, The World's End, The Strain, and World Enough and Time, where he played the First Doctor, a role he's now reprising in Doctor Who's Christmas Special.