Celebrity Transformations Happy Birthday, Reese Witherspoon! By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Published on March 22, 2012 @ 08:00AM Pin Share Tweet Email Photo: Pat/Garcia/Stills/Retna; Vince Bucci/NBC/NBCU What a week for Reese Witherspoon! Not only did is she pregnant with baby number three, the Oscar winner is also celebrating a birthday! The actress turns 36 today, and in celebration, we're taking a look back at her best beauty looks throughout the years. See her transformation now in the gallery now. MORE:• Work a Contrast Belt Like Reese• Reese's Avon Necklace for a Cause• Reese's Bikini Body