PAPARAZZI PREGNANT MARK ZUCKERBERG PRISCILLA CHAN FOUNDER

Mark Zuckerberg may have a new life event to add to his Facebook timeline come next year.

The Facebook founder and his wife Priscilla Chan were spotted strolling in Budapest, Hungary yesterday. In the wake of their one-year wedding anniversary, reports have circulated that Priscilla may be pregnant. Sources at the hotel where the couple have been staying in Budapest said that the Harvard grad hasn't been drinking any alcohol and has refrained from any physical activities. She's been getting in some much-needed R&R.

However, the couple was extremely active during their last vacation. The two hit the surf during their stay in Hawaii last month. They also took in the sights of Kauai in sandals and swimsuits -- Priscilla didn't seem eager to cover up.

Zuckerberg and Chan tied the knot last year in a surprise ceremony at their Palo Alto, Calif. home a few days after Facebook went public. The less than 100 guests in attendance didn't know they would be going to a wedding until they arrived at the scene. So it's safe to assume that the duo will be just as secretive about any future significant life changes.