Maggie Smith was 74 in Nanny McPhee and the Big Bang when she played the character 'Agatha Rose Doherty'.
That was over 14 years ago in 2010.
Today she is 89, and has starred in 90 movies in total, 25 of those since Nanny McPhee and the Big Bang was released.
In Nanny McPhee and the Big Bang, I think Maggie Smith looks: