Kate McKinnon [1] is known for her hilarious and spot-on celebrity impersonations [2], and she made just about everyone's dreams come true when she decided to pull out one of her classics this week. The Ghostbusters star had a little fun on The Ellen DeGeneres Show on Wednesday when she showed up looking exactly like the host herself. Not only was her ensemble identical to Ellen's, but she also took over the opening monologue and completely embodied everything about her. Honestly, we wouldn't expect anything less. See the full video above, and then check out 22 times Kate made you crack up on Saturday Night Live [3].