Celebrity Dresses at Butterfly Ball 2011-06-13 08:38:33

Stars came out for a good cause Saturday night, donning chic cocktail and evening wear as they worked to raise money for the Chrysalis Foundation, which improves the lives of homeless and low-income people via job stability. Olivia Wilde made a fashion-forward choice with New York designer Yigal Azrouel's gown while Jennifer Garner was quietly glam in a short black cocktail dress. Mila Kunis was also understated in her neutral sheath dress, the total opposite of Abigail Spencer who added a jolt of energy via her neon pink frock. Click the slideshow to see all the stars — Eva Mendes, Ashley Greene, and Molly Sims among them — in their Saturday night cocktail wear.