Richard Griffiths was 53 in Harry Potter and the Philosopher's Stone when he played the character 'Vernon Dursley'.
That was over 22 years ago in 2001.
In 2013 he died aged 65, starring in 57 films in his career, 22 of those after Harry Potter and the Philosopher's Stone was first released. If he were alive today he would be 76.
In Harry Potter and the Philosopher's Stone, I think Richard Griffiths looks: