Facebook founder Mark Zuckerberg got married over the weekend to his girlfriend of nine years Priscilla Chan! The couple celebrated with a small ceremony in their Palo Alto, California backyard! People reports the couple suprised the 100 guests, who thought they were celebrating Priscilla’s gradution from medical school! The bride wore a Claire Pettibone “Sky Between the Branches” gown, descibed as having matte sequins and an ivory cut-out embroidery with a sheer back. The dress retails for $4,700 and is available here. Congrats to the happy couple!