The Duke and Duchess of Cambridge, and Beyoncé and her husband, Jay-Z, came face-to-face at a Brooklyn Nets game in New York, Daily Mail reported.
Prince William and his pregnant wife, Kate were seen greeting the singer and rapper during the second half of the game against the Cleveland Cavaliers (Brooklyn Cleveland - 88-110).
They beamed as they exchanged words with the couple, before returning to their courtside seats next to basketball legend, Dikembe Mutombo, where they were handed a box of popcorn and bottles of water.
Beyoncé and Jay-Z, meanwhile, sat down in their own seats directly opposite them.
Kensington Place courtiers had previously arranged with NBA officials that the two couples would meet during the third and fourth quarters of the game at the Barclays Center, which also starred basketball royalty: the Cavaliers' LeBron James, dubbed 'King James'.
And after the Cavaliers trounced the Nets 110-88, the royal couple were led backstage to meet the sport's biggest superstar.
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