Facebook founder has announced on Facebook that he is expecting his first baby with wife Priscilla Chan.
He also revealed that they had been trying for years to get pregnant and suffered three miscarriages.
'Priscilla and I have some exciting news: we're expecting a baby girl!' wrote Zuckerberg on Facebook.
'This will be a new chapter in our lives. We've already been so fortunate for the opportunity to touch people's lives around the world - Cilla as a doctor and educator, and me through this community and philanthropy.
'Now we'll focus on making the world a better place for our child and the next generation.... We want to share one experience to start. We've been trying to have a child for a couple of years and have had three miscarriages along the way.'
Zuckerberg, 31, and Chan, 30, were married on May 19, 2012 in a quiet ceremony in their backyard.