Will Ferrell

Startup(s): Funny or Die

Out of all the startups funded by big name stars, Will Ferrell's may be the best. Founded by Ferrel's production company Gary Sanchez Productions, Funny or Die has brought us some of the funniest skits we've seen on TV or the Internet. It's so good, HBO decided to give Ferrell and his partner Adam McKay some money in 2008 for a 10% stake in the company.