Fiona Shaw was 48 in Harry Potter and the Order of the Phoenix when she played the character 'Petunia Dursley'.
That was over 17 years ago in 2007.
Today she is 65, and has starred in 50 movies in total, 21 of those since Harry Potter and the Order of the Phoenix was released.
In Harry Potter and the Order of the Phoenix, I think Fiona Shaw looks: