Raf Simons for Dior
Who’s worn it: Marion Cotillard, Rachel Weisz, Jessica Chastain, Jennifer Lawrence
Who he is: I mean, if you don’t know at this point…Basically, this Belgian former Jil Sander designer who got his start in menswear is the buzziest name in fashion these days. In addition to making everyone–critics, buyers and execs–happy, his designs, both couture and ready-to-wear, are a sure fire way for a celeb to get on a best dressed list.