Everybody needs friends, even celebrities. In honor of National Best Friend Day on Monday, heck some celebrities who just happen to be best friends.
Ben Affleck and Matt Damon
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Ilya S. Savenok/Getty Images
National Media Museum
Frederick M. Brown/Getty Images for ELLE
Jim Rogash/Getty Images
Jim Rogash/ Getty
U.S. Air Force
Frederick M. Brown/Getty Images
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