David Thewlis was 43 in Harry Potter and the Order of the Phoenix when he played the character 'Remus Lupin'.
That was over 17 years ago in 2007.
Today he is 61, and has starred in 84 movies in total, 41 of those since Harry Potter and the Order of the Phoenix was released.
In Harry Potter and the Order of the Phoenix, I think David Thewlis looks: