Even stars who shine the brightest -- and get paid the most -- often started their working careers at the very bottom. You probably wouldn't guess it by watching them saunter down the dazzling red carpets, but many of Hollywood's most famous faces worked at less-than-glamorous jobs before catapulting to stardom. From pen salesman to convenience store clerk, many of the rich and famous are no strangers to the regular, mundane jobs that many of us are familiar with.