The couple became parents to little Maxima in 2015 and now Mark has announced he and his wife will welcome another daughter later this year (17).

“Priscilla and I are happy to share we’re expecting another baby girl!” he writes on Facebook. “After our difficult experience having Max, we weren’t sure what to expect or whether we’d be able to have another child. When Priscilla and I first found out she was pregnant again, our first hope was that the child would be healthy.

"My next hope was that it would be a girl. I cannot think of a greater gift than having a sister and I’m so happy Max and our new child will have each other.”

The tech billionaire previously revealed Priscilla had suffered three miscarriages in their efforts to start a family before Max was born in November, 2015.

Zuckerberg, who was portrayed by actor Jesse Eisenberg in 2010 movie The Social Network, wed his college sweetheart in 2012.