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Blake Lively Proves She's A Harry Potter Trivia Master Playing Know It All Against Jimmy Fallon — Watch!

| Filed under: TV NewsHarry PotterBlake LivelyJimmy FallonGameLate Night TV

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Even though Blake Lively's new flick The Shallows doesn't look all that great, we're happy she stopped by The Tonight Show on Monday to help promote the flick — so at least something comes of it!

While the blonde beauty was on Jimmy Fallon's late show, the comedian decided to test her knowledge by facing off in a game of Know It All!

Related: Blake Is The Cutest Little Mermaid!

Some of the categories were pretty basic like "Four Letter Word", but it was the Harry Potter question that really let the 28-year-old shine as she showed off her knowledge of HP characters!

Ch-ch-check out the AH-Mazingly fun game as Blake shows Jimmy what she's got (below)!

Lively and Fallon face off in trivia:

Lively dishes on watching Ryan's Deadpool sex scenes:

Jimmy gives the blonde beauty a cutout of himself:

Make sure to watch The Tonight Show every weeknight at 11:35 p.m. EST on NBC!!!

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