Not every actor or musician gets into the business hoping to become the next big star. Sure, the paycheck's not too shabby, but as far as these entertainers are concerned, when it comes to fame, they're happy to say, "No, thanks!" Take Mary-Kate Olsen and Ashley Olsen. Though we watched the twins grow up on "Full House," their adulthood has been more mysterious. From opting out of the "Full House" reboot, "Fuller House," to leaving the acting world behind in lieu of careers in fashion, when Mary-Kate and Ashley show up on a red carpet it's definitely an exciting occasion. Keep reading to see the rest of Hollywood's least camera-friendly stars!