You know we love a good pair of sweat-pants, but lately we're seeing Hollywood's heavy-hitters dressing way down. Case in point, this cute snap of Sienna Miller sporting old-school sweats that look like they're from the '70s, but really, they're $113 by Monrow. Granted, that's a little pricey for gym bottoms, but we'll take these over fancy jeans anyday.
