Wearing his trademark hoodie, Mark Zuckerberg showed up to Facebook's Menlo Park headquarters around 6 a.m. Friday.
The social network's co-founder and CEO was preparing to usher in the new public era of Facebook, when the company begins selling shares on the NASDAQ under the symbol "FB."
The NASDAQ set up a special area at Facebook HQ for Zuckerberg to ring the ceremonial bell remotely.
Employees lined up around a makeshift stage and a jumbo-tron in the center of campus hours before the 28-year-old rang the bell.
Zuckerberg was joined on stage by Facebook COO Sheryl Sandberg, who warmed the crowd up before giving way for the company's young CEO to act out the ceremonial opening.
He rang the bell at 6:30 a.m. Facebook stock is expected to begin trading around 8 a.m. Friday.