Mark Zuckerberg joins Jesse Eisenberg on SNL

Mark Zuckerberg made a guest appearance on Saturday Night Live this weekend, alongside the actor Jesse Eisenberg, who portrayed the Facebook founder as a socially-maladjusted egomaniac in the Oscar-nominated flick The Social Network. Needless to say, the whole thing was really awkward.

The Zuckerberg cameo came during Eisenberg's opening monologue. While Eisenberg chatted with regular Zuckerberg-impersonator and SNL cast-member Andy Samberg, the camera panned backstage, settling on a shot of the real Zuckerberg.

"Those guys are just nerds," Zuckerberg told SNL producer Lorne Michaels. Eventually, he wandered out to join Eisenberg and Samberg. Some gentle ribbing ensued – "it was interesting," Zuckerberg said of The Social Network – and the pair closed the monologue with a handshake.

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It was apparently the first time Eisenberg and Zuckerberg had met. And according to Eisenberg, the meeting was a good one. As Kashmir Hill of Forbes.com notes, the next night, Eisenberg told a reporter for E! that he enjoyed chatting with the Facebook founder.

"[I]t was wonderful,” Eisenberg said. “I can imagine this must be such a strange experience to have a movie made about your life. And the fact that he so generously came and did that and we were both able to have fun about the situation was so sweet.”

Back in December, Time magazine named Zuckerberg its person of the year. The Time magazine nod wasn't exactly a huge surprise: Zuckerberg has presided over the astounding growth of the most popular social network in history, and weathered a string of successive Web security debacles, all the while keeping Facebook leaps and bounds ahead of its competitors.

And now he's got another feather to add to the cap: SNL guest star.

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