Celebrities attend the 2016 NCAA Men's Basketball Tournament

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Wednesday, March 30, 2016
Michael Jordan at the NCAA Final Four tournament college basketball championship game Villanova and North Carolina, Monday, April 4, 2016, in Houston.
Allen Iverson, Michigan State head coach Tom Izzo, Chicago Bulls owner Jerry Reinsdorf, retired WNBA player Sheryl Swoopes and Shaquille O'Neal in Houston on April 4, 2016.
Vice President Joe Biden talks to players in the Syracuse locker room after the NCAA Final Four tournament college basketball semifinal game in Houston on April 2, 2016.
Vice President Joe Biden sits next to his wife Jill Biden during the NCAA Final Four tournament college basketball semifinal game in Houston on April 2, 2016.
Former President George H. W. Bush waves as he arrives at NRG Stadium before the NCAA Final Four tournament college basketball semifinal in Houston, April 2, 2016.
Football Head coach Bob Stoops of the Oklahoma Sooners cheers during the NCAA Men's Final Four Semifinal in Houston on April 2, 2016.
Quarterback Tony Romo of the Dallas Cowboys looks on during the NCAA Men's Final Four Semifinal in Houston on April 2, 2016.
New Jersey Gov. Chris Christie, left, watches during the first half of a regional final men's college basketball game between Notre Dame and North Carolina in the NCAA Tournament.
Actor Bill Murray cheers for Xavier during the second half of a second-round men's college basketball game against Wisconsin in the NCAA Tournament.
Actress Katie Homes and her daughter Suri Cruise attend the game between Stephen F. Austin and Notre Dame during the second round of the 2016 NCAA Tournament.
Denver Broncos linebacker Von Miller, left, and 'Dancing with the Stars' dancer Whitney Carson at the  Oklahoma and Texas A&M in the regional semifinals of the NCAA Tournament.
Former American football quarterback Kurt Warner (White Shirt) at the game between Northern Iowa and Texas A&M during the second round of the 2016 NCAA Tournament.
Tim Cook, CEO of Apple, right, and Los Angeles Laker Kobe Bryant at the NCAA college basketball game between Oregon and Duke in the regional semifinals of the NCAA Tournament.
Former NBA player David Robinson and Los Angeles Laker Kobe Bryant at the NCAA college basketball game between Oregon and Duke in the regional semifinals of the NCAA Tournament.
Los Angeles Laker Kobe Bryant at the NCAA college basketball game between Oregon and Duke in the regional semifinals of the NCAA Tournament.
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Celebrities attend the 2016 NCAA Men's Basketball TournamentMichael Jordan at the NCAA Final Four tournament college basketball championship game Villanova and North Carolina, Monday, April 4, 2016, in Houston.
Charlie Neibergall/AP

From Hollywood stars like Bill Murray, to pro-athletes, to Apple CEO Tim Cook, everyone gets excited about NCAA basketball during March Madness!