United Kingdom, Oct. 12 -- Lenny Rush has promised his Dobby will "look great" in Harry Potter and the Chamber of Secrets.

The 17-year-old actor has been cast as the House Elf in the second season of HBO's upcoming TV adaptation of JK Rowling's magical wizarding novels, and the teenager insisted he's staying tight lipped about the role.

Asked if he could share whether he'll be bringing the character to life via makeup, motion capture, or just a voice role, he told The Big Issue magazine: "Oh no! Sorry, I can't.

"But I've seen the route they're going down and how we're gonna do it together and yeah, Dobby's gonna look great. I'm really pleased with him."

However, Lenny - who insisted he's only seen as much as the fans - admitted he is ...