If you're one of the many Harry Potter fans out there, then you probably recognize Helen McCrory first and foremost from the three Harry Potter films she appeared in: Half-Blood Prince, Deathly Hallows: Part 1, and Deathly Hallows: Part 2.
McCrory plays Narcissa Malfoy, the wife of Lucius and mother of Draco. She first appears in the sixth installment of the series, Harry Potter and the Half-Blood Prince, but one of her most memorable moments comes in the final installment, Deathly Hallows: Part 2. After checking to see if Harry has died, she betrays Voldemort and reports that Harry is dead, when, of course, he is still alive. While taking advantage of the opportunity to find out from Harry if Draco is safe, she uses the moment to protect her family and, consequently, helps Harry defeat Voldemort.
In an interview with Parade Magazine, McCrory said of the series, "I'm sad it's coming to an end, especially for people who started right at the beginning. Quite frankly, it was their lives, not just a film. It's a shame that I joined it so late and Narcissa's part is so fleeting. But however big or small, it's been lovely to be a part of."