Fiona Shaw was 44 in Harry Potter and the Prisoner of Azkaban when she played the character 'Petunia Dursley'.
That was over 20 years ago in 2004.
Today she is 65, and has starred in 50 movies in total, 25 of those since Harry Potter and the Prisoner of Azkaban was released.
In Harry Potter and the Prisoner of Azkaban, I think Fiona Shaw looks: