After attending the Mud photocall this afternoon, pregnant Reese Witherspoon stepped out for the premiere during the Cannes Film Festival tonight. The actress looked radiant in a cobalt blue empire-waist Versace gown. The custom double strap gown was partly crystal embroidered and featured a pleated trailing skirt and criss-cross open back. Reese paired her chiffon gown with strappy Versace sandals and Chopard jewels, including diamond drop earrings. A simple but sophisticated updo and flawless make-up completed Reese's look.