Mark Zuckerberg engaged to girlfriend Priscilla Chan?

Microsoft founder Bill Gates has hinted that his pal and Facebook creator Mark Zuckerberg has got engaged to his long time girlfriend Priscilla Chan.

Speaking to London's Daily Mail, Gates said that the young tech titan has asked his girlfriend to marry him.

Zuckerberg, 26, has been dating Chan, 26, since they were students at Harvard in 2005.

Gates, 55, spilled the beans on his friend's potential nuptials when talking about how fellow philanthropist Zuckerberg decided to give $1 million to Newark's beleaguered school system last year.

"His fiancée, Priscilla, thought about education, and he gave money to Newark," the New York Post quoted him as saying.