Nicholas Hoult joins Harry Potter season two.

Nicholas Hoult is joining the second season of HBO's Harry Potter TV series. The British X-Men star has been cast to play wizard Gilderoy Lockhart, HBO Max announced. The highly anticipated series is due to debut on Christmas Day, with the first season covering the action in Harry Potter and the Philosopher's Stone. The show's second season will be based on Harry Potter and the Chamber of Secrets. Lockhart is a central character in Chamber of Secrets; a famous wizard known for heroic acts yet also incredibly arrogant and vain.