Kelly Macdonald As Helena Ravenclaw
Yes, there were two actresses who portrayed the Grey Lady on the list. However, the old actress only appeared up to the second installment of the series! Kelly Macdonald ended up taking over when the character returned in Harry Potter and the Deathly Hallows: Part 2. She helped take down Voldemort by telling Harry about the diadem. It was one of the Horcruxes that Harry had to destroy!
Kelly Macdonald Now
It is true that her role in the series was not the biggest role in history. Despite this, she was able to use this platform to showcase her incredible acting skills! She has since appeared in a number of Hollywood movies. Among other things, you might have seen her in recent projects like Goodbye Christopher Robin, No Country for Old Men, and Holmes and Watson.