Comedian Jimmy Fallon is known for stints on NBC's Saturday Night Live and as the host of Late Night with Jimmy Fallon. A cast member of SNL since 1998, Fallon is a classic for his impressions of John Lennon, Howard Stern, Adam Sandler, and the ever so popular Mick Jagger. When he's not starring opposite SNL head writer/player Tina Fey on the "Weekend Update," he's making people laugh as the online stoner/college kid Jarrett of "Jarrett's Room" and as the cynical "Nick Burns, Your Company's Computer Guy." The world didn't fall at Fallon's feet , however. He had to earn it.