Mark Zuckerberg says the 'most important thing' he built at Harvard was a prank website: 'Without Facemash I wouldn't have met Priscilla'

Mark Zuckerberg laughs during his 2017 Harvard commencement speech (Credit: Paul Marotta—Getty Images)

For Mark Zuckerberg, the most significant creation from his two years at Harvard University wasn’t the precursor to a global social network, but a prank website that nearly got him expelled.

The Meta CEO said in a 2017 commencement address at his alma mater that the controversial site, Facemash, was “the most important thing I built in my time here” for one simple reason: it led him to his wife, Priscilla Chan.​