Priscilla Chan Wedding Dress: Details Revealed!

While Mark Zuckerberg was taking Facebook public, his longtime girlfriend Priscilla Chan was quietly putting the final touches on her wedding gown.

In a surprise relationship status update, Zuckerberg and Chan married Saturday in a small, unannounced ceremony at their home in Palo Alto, Calif.

The bride looked stunning in Claire Pettibone’s “Sky Between the Branches” gown, an ivory laser-cut floral dress with matte sequins lined in silk.

The gown featured subtle cutouts in the overlay, plus an illusion jewel neckline, sheer back and chapel-length train. Chan's dress retails for $4,700.

Pettibone, a Los Angeles-based designer, has also created wedding dresses for stars like Mad Men's Elisabeth Moss and American Idol's Tamyra Gray.

Guests thought they were merely coming over for a surprise party to celebrate Chan’s graduation from medical school at the University of California.

However, the couple, who met at Harvard more than nine years ago, had been planning the low-key wedding for more than four months.

Given that Facebook stock is already down $4 today, at least Mark has something to smile about ... well that and being worth tens of billions.