BREAKING: Mark Zuckerburg Marries Priscilla Chan in Small Ceremony At His Home

Priscilla Chan, the long time girlfriend of Mark Zuckerberg, earned her medical degree on Monday from the University of California, San Francisco's School of Medicine, according to Seattlepi.com.

“I’m so proud of you, Dr. Chan : )" Zuckerberg wrote on his Facebook page.

But the world's eyes were on her Friday for another reason: Zuckerberg's company, Facebook, began trading publicly today reaching as much as $21 billion of value today.

Chan and Zuckerberg have been dating since Zuckerberg was a student in Harvard. They reportedly met at a party while waiting in line for the bathroom.

Chan told The New Yorker that she thought Zuckerberg was "this nerdy guy who was just a little bit out there."

Since she is Chinese-American, she has triggered interest in Zuckerberg to learn Chinese. They have also been spotted vacationing in the country.

When Chan moved to Palo Alto to live near her boyfriend, she famously made him sign a "contract."

"One date per week, a minimum of a hundred minutes of alone time, not in his apartment and definitely not at Facebook," according to Sarah Lacy's book Once You're Lucky, Twice You're Good.

So far, the couple have not announced an engagement nor a ring has been spotted on Chan's finger.

Check Out Her Pictures Here!