Kelly Macdonald – Helena Ravenclaw

Time to shout out to Kelly Macdonald, for without her, we wouldn’t have the perfect casting for Helena Ravenclaw, also known as the Grey Lady. After her magical days, the Scottish star didn’t just vanish like a ghost from Hogwarts because she’s been busy as a house elf on a cleaning spree.

You might’ve caught her in the crime drama “Line of Duty,” where she’s a force to be reckoned with. Fans would also recognize this BAFTA winner’s voice on Disney’s “Brave,” where she voiced Merida. Besides these, Kelly ventured into mysteries and thrillers with “The Victim” and “Black Mirror,” showcasing her acting range.