Cary Grant was 35 in The Philadelphia Story when he played the character 'C. K. Dexter Haven'.
That was over 83 years ago in 1940.
In 1986 he died aged 82, starring in 133 films in his career, 87 of those after The Philadelphia Story was first released. If he were alive today he would be 119.
In The Philadelphia Story, I think Cary Grant looks: