October is off to a great start with all of our favorite It girls bringing their fashion out in full force. Rachel Zoe’s best-dressed list for this week includes everyone from the always-chic Sienna Miller on the red carpet in a ethereal white gown to the polished Amal Clooney in a dégradé emerald trench coat to stylish Kendall Jenner stepping out wearing off-duty denim. Your weekly fashion recap starts here.