Billionaire Mark Zuckerberg and his college sweetheart Priscilla have become proud parents to a baby girl they have named Max.
And with her arrival comes the amazing announcement they will be donating most of their $45 billion fortune.
Taking to Facebook to announce their daughter's birth, 31-year-old Mark wrote:
'Dear Max
'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.
'Like all parents, we want you to grow up in a world better than ours today,' it says. 'While headlines often focus on what's wrong, in many ways the world is getting better. Health is improving. Poverty is shrinking. Knowledge is growing. People are connecting. Technological progress in every field means your life should be dramatically better than ours today.
Priscilla and I are so happy to welcome our daughter Max into this world!For her birth, we wrote a letter to her about... > >
Posted by [Mark Zuckerberg](https://www.facebook.com/zuck) on [Tuesday, December 1, 2015](https://www.facebook.com/notes/mark-zuckerberg/a-letter-to-our-daughter/10153375081581634)
'We will do our part to make this happen, not only because we love you, but also because we have a moral responsibility to all children in the next generation.
'We believe all lives have equal value, and that includes the many more people who will live in future generations than live today. Our society has an obligation to invest now to improve the lives of all those coming into this world, not just those already here.
'We will give 99% of our Facebook shares -- currently about $45 billion -- during our lives to advance this mission,' the letter says. 'We know this is a small contribution compared to all the resources and talents of those already working on these issues. But we want to do what we can, working alongside many others.'
What an amazing gesture- congrats guys!