“Harry Potter” hasn’t even premiered yet, but all eyes are on casting for the future seasons. Those are some big shoes to fill, but if anyone can, fans know it’s the man “Harry Potter” has found. Who Will Play Lockhart in ‘Harry Potter’ Season 2? He routinely takes on some of the more outlandish and humorous characters in movies and on TV now, and so, it’s no wonder that “Harry Potter” saw him as the perfect Lockhart. It’s all revealed as Harry and others turn to him for help during “Harry Potter and the Chamber of Secrets,” which is the book the second season will adapt.