Rupert Grint was 19 in Harry Potter and the Half-Blood Prince when he played the character 'Ron Weasley'.
That was over 15 years ago in 2009.
Today he is 35, and has starred in 24 movies in total, 13 of those since Harry Potter and the Half-Blood Prince was released.
In Harry Potter and the Half-Blood Prince, I think Rupert Grint looks: