Gravity: fundament of physics, foe of aging physiques. Those of us north of 30 must go the extra mile (literally) to maintain the sort of shape that, at nineteen, came with the territory. In Hollywood, especially, where youth and beauty are considered tantamount to talent, the pressure to stay toned and looking fit is enormous. Recently, however, several leading ladies seem to have cracked the code, debuting enviable proportions that aren't just on par with-but an actual improvement from-their days as dewy ingenues. Gwyneth Paltrow's sheer Antonio Berardi dress at this week's Hollywood Iron Man 3 premiere drew gasps not because it was risqué but because the 40-year-old star looked so phenomenal in it. And, at 47, House of Cards' Robin Wright's svelte arms and muscular calves are nothing short of inspirational. Here, Vogue.com takes a look at those whose bodies, like a fine cabernet, have gotten better with age.