Just about 24 hours after watching his company go public, Facebook founder Mark Zuckerberg has tied the knot with his long-time girlfriend Priscilla Chan.

The 28 year-old CEO whose profile status now reads "married" exchanged vows with his medical practitioner fiance at a small ceremony at the groom's home in Palo Alto, Calif.

Guests who were originally invited to a celebration for Chan who just graduated from medical school were surprised to learn that it was a wedding.

Facebook which was formed from Zuckerberg's Harvard dormitory room in 2004 is now worth about $16.9 billion, making it one of the largest companies in the world.