Roddy McDowall was 58 in Overboard when he played the character 'Andrew'.
That was over 36 years ago in 1987.
In 1998 he died aged 70, starring in 166 films in his career, 51 of those after Overboard was first released. If he were alive today he would be 95.
In Overboard, I think Roddy McDowall looks: