Priscilla Chan and Mark Zuckerberg Credit: Steve Jennings/Getty Images

Like! Mark Zuckerberg and his wife, Priscilla, have welcomed their first child together. The Facebook co-founder announced the news on the social media platform on Tuesday, Dec. 1.

"Priscilla and I are so happy to welcome our daughter Max into this world! For her birth, we wrote a letter to her about the world we hope she grows up in," Zuckerberg, 31, captioned a photo of the couple and their newborn. "It's a world where our generation can advance human potential and promote equality — by curing disease, personalizing learning, harnessing clean energy, connecting people, building strong communities, reducing poverty, providing equal rights and spreading understanding across nations."

He continued: "We are committed to doing our small part to help create this world for all children. We will give 99% of our Facebook shares — currently about $45 billion — during our lives to join many others in improving this world for the next generation. Thank you to everyone in this community for all your love and support during the pregnancy. You've given us hope that together we can build this world for Max and all children."

Zuckerberg also revealed that he and his wife launched the Chan Zuckerberg Initiative in Max's honor. The organization will promote equality for children across the globe, and will raise money to cure disease and build communities. They plan to put their Facebook shares toward the project. 

"Your mother and I don't yet have the words to describe the hope you give us for the future. Your new life is full of promise, and we hope you will be happy and healthy so you can explore it fully. You've already given us a reason to reflect on the world we hope you live in," he gushed in his letter. "Max, we love you and feel a great responsibility to leave the world a better place for you and all children. We wish you a life filled with the same love, hope and joy you give us. We can't wait to see what you bring to this world."

Mark and Priscilla, who suffered previous miscarriages, married in 2012 after nine years of dating. The Facebook CEO recently revealed that he will be taking two-month paternity leave.

Read his full letter to his daughter here.

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