Mark Zuckerberg, CEO and founder of Facebook and Instagram, is one of the richest people in the world. New pics of Mark's wife's baby shower just hit the internet, and they show that the billionaire tech giant - is extremely frugal.

Mark and his wife, Priscilla Chan, posted pics of their baby shower on Facebook - and immediately the pics went viral.

The baby shower was held inside the Zuckerberg's home, which is surprisingly humble for a man worth more than $50 billion.

And the decorations for the event which had a very "Dollar Store" look was even more surprising. The couple taped paper cut-out letters on the wall and served food using paper plates and napkins.

It's definitely not what people expected a billionaire's baby shower to look like.

This will be the third child for Mark and Priscilla. The couple already have a daughter Maxima Chan Zuckerberg, who is 3 and a second daughter, named August.

At the time of the above photos the couple, who had been married for three years, they announced in July that they were expecting a baby. Alongside a picture of himself proudly posing with his pregnant wife, Mark told his 33million followers: "Priscilla and I have some exciting news. We're expecting a baby girl! 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."