Cary Grant was 39 in Arsenic and Old Lace when he played the character 'Mortimer Brewster'.
That was over 80 years ago in 1944.
In 1986 he died aged 82, starring in 133 films in his career, 76 of those after Arsenic and Old Lace was first released. If he were alive today he would be 120.
In Arsenic and Old Lace, I think Cary Grant looks: