MORE: Mystery 'Mega' Mcdonald's sign appears on roundaboutLockhart, Hogwarts' vain and celebrity-loving Defence Against the Dark Arts teacher, was famously portrayed by Sir Kenneth Branagh in the 2002 film adaptation of Harry Potter and the Chamber of Secrets. The second season of HBO's reboot will adapt the same book from JK Rowling's bestselling series. Others highlighted Hoult's recent work, with one posting: "Nicholas Hoult wrapped on Cry to Heaven starring two transgender actresses and decides to join the Harry Potter TV show next." Another described Hoult as "perfect casting", while others said the role suited the actor's mix of charm, comedy and screen presence. Hoult joins a growing cast for the high-profile adaptation, which HBO hopes will retell each of Rowling's novels across multiple seasons