Michael Gambon was 65 in Harry Potter and the Order of the Phoenix when he played the character 'Albus Dumbledore'.
That was over 17 years ago in 2007.
Today he is 83, and has starred in 112 movies in total, 33 of those since Harry Potter and the Order of the Phoenix was released.
In Harry Potter and the Order of the Phoenix, I think Michael Gambon looks: