The slam dunks, cheers, and, of course, the postgame parties — March Madness is officially here! As the NCAA teams battle it out over hoops, we're taking a look at all the celebs who cheer on their favorite teams courtside, as well as the cute couples showing PDA on the Kiss Cam. Whether it's Katie Holmes jumping up with joy for the NY Knicks, Justin Timberlake cheering on the LA Lakers, Mary Kate and Ashley Olsen sitting on the edge of their seats at Madison Square Garden, or Ashton Kutcher celebrating with Mila Kunis, stars love to feel the basketball spirit from the sidelines. See celebs hanging out, drinking beer, and checking out the cheerleaders when you scroll down!
Source: Getty / James Devaney