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Reese Witherspoon, Prince William, and more really excited stars!

By Katie Mathewson Slide 1 of 16

These stars are so excited that they just can't hide it (no matter how silly they may look)! Whether they're worked up because they're gambling, greeting fans, or just showing off for the paparazzi, we've rounded up the widest eyes, biggest smiles, and most dramatic jaw drops we could find. Click to get excited for the June 28 release of "I'm So Excited!" with Antonio Banderas and Penelope Cruz!RELATED:Celebs looking angry Reese Witherspoon, you're not fooling anyone. Nobody likes working out that much.
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