Helen McCrory was 41 in Harry Potter and the Deathly Hallows: Part 2 when she played the character 'Narcissa Malfoy'.
That was over 13 years ago in 2011.
In 2021 she died aged just 52, starring in 48 films in her career, 16 of those after Harry Potter and the Deathly Hallows: Part 2 was first released. If she were alive today she would be 55.
In Harry Potter and the Deathly Hallows: Part 2, I think Helen McCrory looks: