Dave Karger
May 20, 2012 AT 02:41 PM EDT

As if his company’s IPO wasn’t enough big news for one week, Facebook founder and CEO Mark Zuckerberg got married on Saturday as well. Zuckerberg, 28, and his longtime girlfriend, Priscilla Chan, 27, told friends they would be attending a party in Palo Alto, Calif., to celebrate Chan’s recent graduation from medical school, but surprised attendees by telling them that the pair would be marrying instead. Zuckerberg posted the news on his Facebook timeline; the post has over 750,000 likes and counting.

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