Congratulations to Mark Zuckerberg and his wife Priscilla Chan! The Facebook founder, 38, and philanthropist, 37, announced they are pregnant with their third child. Taking to his Instagram on Wednesday (September 21), Mark shared the happy news with his 10m followers by posting a sweet snap of the couple, who already share daughters Maxima (Max), 6, and August, 5.

“Lots of love,” Mark wrote alongside the snap of him placing his hand on Priscilla’s growing baby bump. “Happy to share that Max and August are getting a new baby sister next year!”