4. JENNA FISCHER
Since earning her breakout role as Pam, Fischer has starred as the girl-next-door you fall in love with in each new episode. Before marrying John Krasinski's character (Jim Halpert) in of the most publicized fictional TV weddings of our time, Fischer struggled to get into the business. She admits that her first paying role was a sex education video given to psychiatric patients upon their release from UCLA Medical Center. That almost qualifies as a sex tape if you try very, very hard to convince yourself it's not at all creepy.