Pete Postlethwaite was 47 in In the Name of the Father when he played the character 'Giuseppe Conlon'.
That was over 30 years ago in 1993.
In 2011 he died aged 65, starring in 79 films in his career, 52 of those after In the Name of the Father was first released. If he were alive today he would be 79.
In In the Name of the Father, I think Pete Postlethwaite looks: