Mark Zuckerberg on Saturday Night LiveFrom PopEater: Last night's 'Saturday Night Live' was hardly what you'd call a Mark Zuckerberg Production, but it did feature a spirited cameo from the Facebook co-founder.

As predicted, Zuckerberg wasn't about to let Jesse Eisenberg -- newly Oscar-nominated for playing the young lawsuit magnet in 'The Social Network' -- hog the 'SNL' spotlight.

During the 27-year-old actor's stammering monologue about his faux bravado in nervewracking situations, a hoodie-clad Andy Samberg sidled onstage impersonating Zuckerberg. And while they bantered, 'SNL' impresario Lorne Michaels stood offstage, wondering which joker was actually the 26-year-old TIME Person of the Year.

By Lorne's side? The real deal.
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