Alan Rickman was 64 in Harry Potter and the Deathly Hallows: Part 2 when he played the character 'Severus Snape'.
That was over 13 years ago in 2011.
In 2016 he died aged 69, starring in 69 films in his career, 13 of those after Harry Potter and the Deathly Hallows: Part 2 was first released. If he were alive today he would be 78.
In Harry Potter and the Deathly Hallows: Part 2, I think Alan Rickman looks: