Paul Lieberstein played hapless HR rep Toby Flenderson in The Office, but even the most avid fans may be surprised to learn he was also a writer and producer on the show. In fact, he started out solely as a writer before being persuaded to perform by the show's executive producer Greg Daniels. With no prior acting experience, Lieberstein once admitted that Steve Carell's crazy improv during scenes frequently threw him off.

Lieberstein had some success as a writer before The Office, although he was actually fired from his first writing job on the Nickelodeon show Clarissa Explains It All in the 1990s. A few years later, he began working on the animated sitcom King of the Hill alongside Daniels, who also happened to be his brother-in-law. Thanks to The Office, Lieberstein's career soared to new heights, and he now has a reported net worth of $14 million (£12.2m).

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