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Oops! LeBron James Breaches Royal Protocol

Oops! LeBron James Breaches Royal Protocol

NEW YORK, NY - DECEMBER 08: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with basketball player LeBron James (R) backstage as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. (Photo by Neilson Barnard/Getty Images)
NEW YORK, NY - DECEMBER 08: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with basketball player LeBron James (R) backstage as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. (Photo by Neilson Barnard/Getty Images)

Prince William and wife Kate met LeBron James Monday night after the Cleveland Cavaliers played the Brooklyn Nets in New York, and the NBA star accidentally breached royal protocol ... by putting his arm around Kate.