updated 05/28/2012 AT 2:00 PM ET
•originally published 05/28/2012 AT 10:00 AM ET
The guests at Mark Zuckerberg’s surprise backyard wedding first saw bride Priscilla Chan, 28-year-old Zuckerberg’s longtime girlfriend, turning the corner in a beautiful white gown, accompanied by the couple’s dog, Beast.
The 1-year-old Puli, an Internet celebrity in his own right (his Facebook page has 570,000 likes), wore his shaggy Hungarian sheepdog hair pinned up over his eyes. Chan, 27, walked him on a ribbon-like white leash down the makeshift aisle.