Facebook co-founder and chief executive Mark Zuckerberg has married his longtime girlfriend Priscilla Chan. The wedding took place on Saturday May 19th 2012.

Secret weddings are becoming the happening thing for celebs, the news of the wedding was announced on Facebook, in attendance were just a few guests who thought they were coming over for a surprise party to celebrate Chan's graduation from UCSF medical school.

"Mark added a life event to May 19, 2012 on his timeline: Married Priscilla Chan," the page's activity feed said.

Zuckerberg, 28, posted a simple wedding photograph, showing the couple against a backdrop of plants and small lights on a string.

Both he and Chan also updated their relationship status to "married."

The pair met during Zuckerberg's sophomore year at Harvard University, where he first nursed Facebook as a dorm-room project.