Facebook founder Mark Zuckerberg and his wife Priscilla Chan had their newborn daughter Max on Tuesday, according to a Facebook post.
In July, Zuckerberg posted that they were expecting a baby girl, and described the challenges they expereinced along the way.
According to Zuckerberg, they tried to have a baby for years but Priscilla experienced three miscarriages along the way.
On Tuesday, Zuckerberg posted a letter he and Priscilla wrote to Max about the world they hope she grows up in.
He also pledged to donate 99 percent of his Facebook shares to charity during his life, which works out to nearly $45 billion.
"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," Zuckerberg posted.