GoT's Kit Harington joins HBO's Harry Potter series as Gilderoy Lockhart

'Game of Thrones' actor Kit Harington has joined HBO's 'Harry Potter' series as Gilderoy Lockhart in Season 2. He replaced Nicholas Hoult, who was announced for the role only a few weeks ago. The makers announced that Hoult was replaced due to scheduling conflicts. Previously, Kit played Lockhart in the Harry Potter audio editions.