If you gasped when you saw young Minerva McGonagall (Fiona Glascott) appear onscreen, you're not alone. It's such a treat to see the professor as she's just starting out at Hogwarts, chasing after students on the grounds looking very differently than how we're used to seeing her. With her hair piled up in a glamorous bun on the top of her head and dressed in a Victorian-style white dress, you'd never even know it was her. Good thing her thick Scottish accent gives her away!