Christine Baranski was 65 in Mamma Mia! Here We Go Again when she played the character 'Tanya'.
That was over 6 years ago in 2018.
Today she is 72, and has starred in 55 movies in total, 4 of those since Mamma Mia! Here We Go Again was released.
In Mamma Mia! Here We Go Again, I think Christine Baranski looks: