Zuckerberg is a billionaire six times over The Social Network, movie about the rise of internet phenomenon Facebook, has topped the US box office chart for a second week.
Social Network, written by West Wing creator Aaron Sorkin and directed by David Fincher, stars Justin Timberlake and newcomer Jesse Eisenberg.
The film charts the history of the website from its launch in 2004.
It goes on to track the legal battle between creator Mark Zuckerberg and several fellow students at Harvard.
His former friends claim he stole their idea.
The Social Network took $15.5m (£9.8m) in its second week.
North American box office1. The Social Network – $15.5m2. Life As We Know It – $14.5m3. Secretariat – $12.7m4. Legend of the Guardians – $6.9m5. My Soul To Take – $6.8m
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