Alfred Hitchcock was 54 in Rear Window when he played the character 'Clock-Winder in Songwriter's Apartment (uncredited)'.
That was over 69 years ago in 1954.
In 1980 he died aged 80, starring in 82 films in his career, 60 of those after Rear Window was first released. If he were alive today he would be 123.
In Rear Window, I think Alfred Hitchcock looks: