Status update: Mark and Priscilla Zuckerberg are expecting a baby!

Mark Zuckerberg and Dr Priscilla Chan are expecting their first child together, he announced today – on Facebook, of course.

The baby, a girl, will arrive later this year. 

In a picture which accompanied the online post, Mark and a radiant Priscilla can be seen standing alongside their beloved pup, a Hungarian sheepdog named Beast.

Mr Zuckerberg, one of the world's richest men with a net worth of €42.5bn, also opened up about Priscilla's three heartbreaking miscarriages. 

"We've been trying to have a child for a couple of years and have had three miscarriages along the way," he admitted,

In a candid confession, the 31-year-old continued: "You feel so hopeful when you learn you're going to have a child. You start imagining who they'll become and dreaming of hopes for their future.

"You start making plans, and then they're gone. It's a lonely experience.

"Most people don't discuss miscarriages because you worry your problems will distance you or reflect upon you – as if you're defective or did something to cause this. So you struggle on your own."

However, Mark added that when he began to open up about their experiences to friends and family, he realised they were far from alone. And thankfully, he also learned that "nearly all" went on to have "healthy children after all".

Dr Chan, 30, is a qualified doctor who is currently training to become a paediatrician. She is fluent in three languages – English, Spanish, and Cantonese.

"Our good news is that our pregnancy is now far enough along that the risk of loss is very low and we are very hopeful," the Facebook CEO also said. 

"Cilla and our child are both healthy, I'm extremely excited to meet her and our dog Beast has no idea what's coming.

"In our ultrasound, she even gave me a thumbs up 'like' with her hand, so I'm already convinced she takes after me."

He concluded with: "We're looking forward to welcoming her into the world and sharing more soon when she's ready to come out and meet everyone!"

The couple met as Harvard classmates – queuing for the bathroom at a fraternity party – and dated for nearly a decade before their May 2012 wedding.