Priscilla Chan wore a Claire Pettibone dress on her walk down the aisle with Facebook creator Mark Zuckerberg

Long-time girlfriend of Mark Zuckerberg, Priscilla Chan, was finally declared the Facebook creator's bride on Saturday, wearing a Claire Pettibone "Sky Between the Branches" gown.

Zuckerberg and Chan had a small ceremony in their backyard in Palo Alto, Calif., reports People. Less than 100 guests showed up to celebrate what they thought would be a party to celebrate Chan's graduation from medical school. Little did they know that Zuckerberg and Chan had been planning the wedding for more than four months.

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