Max von Sydow was 43 in The Exorcist when he played the character 'Father Lankester Merrin'.
That was over 50 years ago in 1973.
In 2020 he died aged 90, starring in 157 films in his career, 115 of those after The Exorcist was first released. If he were alive today he would be 95.
In The Exorcist, I think Max von Sydow looks: