Maureen O'Hara was 25 in Miracle on 34th Street when she played the character 'Doris Walker'.
That was over 77 years ago in 1947.
In 2015 she died aged 95, starring in 69 films in her career, 48 of those after Miracle on 34th Street was first released. If she were alive today she would be 103.
In Miracle on 34th Street, I think Maureen O'Hara looks: