Jamie Campbell Bower was 20 in Harry Potter and the Deathly Hallows: Part 1 when he played the character 'Young Grindelwald'.
That was over 14 years ago in 2010.
Today he is 35, and has starred in 18 movies in total, 10 of those since Harry Potter and the Deathly Hallows: Part 1 was released.
In Harry Potter and the Deathly Hallows: Part 1, I think Jamie Campbell Bower looks: