Billionaire Facebook founder Mark Zuckerberg tied the knot with girlfriend of nine years, Priscilla Chan, on May 19, 2012, just one day after his company made its public trading debut. Zuckerberg simply made the wedding announcement by updating his relationship status to 'Married Priscilla Chan.' The wedding took place in the backyard of Zuckerberg's home in Palo Alto, California with less than 100 guests who had no idea they were going witness a wedding. Zuckerberg ditched his trademark hoodie for a black suit and tie, while Priscilla wore a Claire Pettibone wedding dress she bought using a fake name.