The three face(book)s of Mark Zuckerberg erupted on the set of 'Saturday Night Live' (Sat., 11:30pm on NBC) as the real deal dropped in on host Jesse Eisenberg's monologue. Eisenberg, of course, played him in the Oscar-nominated film 'The Social Network.

In the monologue bit, Andy Samberg came out in his Mark Zuckerberg persona to give Eisenberg crap for getting an Oscar nomination for portraying him in the film.

"what do I get," he asked. "What do I have to feel good about?"

"Wasn't Facebook just valued at like $50 billion?" Eisenberg responded.

But then the real Zuckerberg stepped onto the stage. It must have been disappointing that the secret of his cameo was blown in the media, but the live crowd still gave him a raucous applause.

"Have you two not met?" Samberg asked Zuckerberg and Eisenberg, referring to the fact covered extensively in the media that Zuckerberg was not involved in the film process, and for the longest time hadn't even seen it.

Eisenberg asked him if he'd ever gotten around to it and was pleased to hear that he had. When asked what he thought of it, Zuckerberg said, "It was ... interesting."

That's the best way to sum up Zuckerberg's appearance on 'SNL.' It wasn't as funny as it could have been, but it was a fun idea for a cameo. Still, we don't think Zuckerberg will be lining up to host the show himself anytime soon.

Watch the full episode here: