Palo Alto, California - And baby makes five! Mark Zuckerberg revealed on Instagram that he is expecting his third child with his wife Priscilla Chan.

It appears that the 38-year-old Meta CEO and his longtime love have been keeping a little secret as he confirmed that they have another bundle of joy on the way.

On Wednesday, Zuckerberg revealed that he and his college sweetheart are expecting a third baby girl via a sweet IG post.

"Lots of love. Happy to share that Max and August are getting a new baby sister next year!" he penned under the pic of the spouses smiling while Zuckerberg sweetly cradles his wife's belly.

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The pair who are already parents to Maxima "Max" and August have been open with their fertility issues in the past.

In 2015 before the birth of their first child, Zuckerberg revealed that Chan had previously experienced three miscarriages.

Earlier this year, the longtime couple who wed in 2012 celebrated their 10-year anniversary by recreating one of the photos they took together on their special day.

The business magnate shared the cute snaps on his IG and kept the caption simple and sweet. "10 years married and half our lives together. Here's to more adventures," Zuckerberg wrote.

Congratulations to the happy couple!