Harry Melling was 17 in Harry Potter and the Order of the Phoenix when he played the character 'Dudley Dursley'.
That was over 17 years ago in 2007.
Today he is 35, and has starred in 17 movies in total, 12 of those since Harry Potter and the Order of the Phoenix was released.
In Harry Potter and the Order of the Phoenix, I think Harry Melling looks: