Pierce Brosnan was 64 in Mamma Mia! Here We Go Again when he played the character 'Sam'.
That was over 6 years ago in 2018.
Today he is 71, and has starred in 119 movies in total, 9 of those since Mamma Mia! Here We Go Again was released.
In Mamma Mia! Here We Go Again, I think Pierce Brosnan looks: