Emma Watson is well-k**wn for her poised and elegant nature, but during The Ellen DeGeneres Show on Friday, she let her hair down for a hilarious Hidden Camera Prank with the host. Taking a page out of The Bachelor's Corrine Olympios's playbook, the Beauty and the Beast actress pretended to hire a nanny . . . for herself. As she interviewed a potential employer backstage, Ellen fed her a few wacky (and sometimes downright awkward) lines through an ear piece. Let's just say, it's e**ugh to make you want to hide under the Cloak of Invisibility. See how it all goes down above.