HBO confirmed Tuesday that the 36-year-old British actor, who played Lex Luthor in DC's Superman and Beast across multiple X-Men films, has been cast as Gilderoy Lockhart in Season 2 of its Harry Potter series, which adapts Harry Potter and the Chamber of Secrets. The full-circle element: as a child, Hoult auditioned multiple times for the role of Harry Potter for the original film adaptations. The main cast includes Dominic McLaughlin as Harry, Arabella Stanton as Hermione, Alastair Stout as Ron, John Lithgow as Dumbledore, Janet McTeer as McGonagall, Paapa Essiedu as Snape and Nick Frost as Hagrid.