Michael Gambon was 69 in Harry Potter and the Deathly Hallows: Part 1 when he played the character 'Albus Dumbledore'.
That was over 14 years ago in 2010.
Today he is 83, and has starred in 112 movies in total, 27 of those since Harry Potter and the Deathly Hallows: Part 1 was released.
In Harry Potter and the Deathly Hallows: Part 1, I think Michael Gambon looks: