Alfred Hitchcock was 50 in Strangers on a Train when he played the character 'Man Boarding Train Carrying a Double Bass (uncredited)'.
That was over 72 years ago in 1951.
In 1980 he died aged 80, starring in 82 films in his career, 62 of those after Strangers on a Train was first released. If he were alive today he would be 124.
In Strangers on a Train, I think Alfred Hitchcock looks: