Jamie Campbell Bower (Grindelwald) attended the UK premiere for
Public Enemies last night, where he gave an interview to Digital Spy in which he briefly confirms that he has started work on
Deathly Hallows. The interview (which does contain some mild swearing) can be watched
here. The Harry Potter part is about 2 minutes in.
We also have photos of Jamie on the red carpet, which can be seen
here;


