Olsen Twins.

Though they look identical, Mary-Kate and Ashley, born on June 13th, 1986 in Sherman Oaks, California, are actually fraternal twins. Ashley is the "older" one, arriving a full two minutes before her sister. A close family friend persuaded reluctant mother Jarnette to take the four-month-old babies to an audition for a TV sitcom that was about to begin filming. After the producers held the babies in their arms without inducing any crying, the twins were rewarded with their first role, in the easiest audition they would ever have to do.

There's something undeniably wholesome about the Olsen twins. They may seem stuck in a world where discussing their latest crush is "totally cool," but weren't we all just as corny back in the day? Not only does playing out this teenage fantasy seem realistic for them, it makes good business sense too. Is anyone else completely impressed to find that these two ladies are, at last reports, worth over $38 million... each? Ever since their debut on Full House when they were merely nine months old, they have remained extremely attractive for the "tween" market of 8 to 12-year-olds. In fact, Mary-Kate and Ashley have hovered atop the Q ratings -- which measure the percentage of viewers that know and like a certain celebrity -- since their debut. No other child star has had this kind of longevity (and clout) in recent memory.

Though we can't tell Mary-Kate and Ashley apart, they have always caught our eye. From cute little kids to fully-grown stars, the Olsen twins represent a double dose of pure hotness. Before they could barely walk, the Olsen twins were already known across the land as the irresistible "Michelle Tanner" on Full House. Milking the children's market, the twins established a virtual empire, producing several straight-to-video movies, interactive games and a full-length big-screen feature called It Takes Two. Now, Mary-Kate and Ashley have their own line of clothing and perfume to add to their constant TV appearances.