5. Sarah Michelle Gellar
Sarah Michelle Gellar has been acting since she was four years old (she was the kid in those old Burger King commercials that caused a lawsuit about using competitor's names in commercials, for those of you who are interested in entertainment legal history). So you would think that we would notice her aging more than other actors, since we've been watching her pretty much forever. But I'm not actually sure she is aging. To my eyes, the Sarah Michelle Gellar from season 7 of Buffy the Vampire Slayer over ten years ago is almost identical to her today. If I didn't know anything about her, I would say that she had aged a year or two. But ten? Surely not! After seven years on Buffy, Gellar launched herself into the film world, where she appeared in everything from the deliciously edgy Cruel Intentions to the more kid-friendly Scooby Doo live action remake. Over the past few years, she's been working on TV again, first with The Ringer and currently starring on The Crazy Ones with Robin Williams. But no matter how many years pass, she still maintains the same youthful presence that made us fall in love with her back in the day.