When fall weather first arrives, we're often thrust into a weird limbo period that makes it difficult to decide what to wear. Thankfully, there's one A-list-approved piece that solves this style dilemma: lightweight sweaters. Natalie Portman and Bethenny Frankel's recent looks showcased this staple's trendy yet cozy appeal. Even Jennifer Lawrence recently joined in on the fun, wearing an eye-catching knit of her own. Back in September, the Die, My Love actress, 35, stepped out wearing a $1,250 Phobe Philo Shrunk V-neck sweater - and we've been swooning over it ever since.