Also during this time, she starred on Broadway in Private Lives in 1975 and Night and Day in 1979, receiving Tony Awardnominations for both.
It was sold for 6 million Pounds in 2015! Likewise, she won Best Acting Ensemble for Gosford Park 2001 at Critics Choice Award.
And she reprised the role for six of the seven Harry Potter sequels.
Here are 20 pictures of Maggie Smith when she was young, all in black and white since she was in her twenties during the 1950's.
One shot saw the young Dame Maggie showcasing her assets in a corseted frock with a low-cut neckline.
And what makes us to sure? A year after undergoing chemotherapy treatments, Dame Smith was given a clean bill of health by doctors.