Jennifer Garner, Ashley Greene, and Olivia Wilde all made stunning and sexy entrances to Saturday night's Chrysalis Butterfly Ball in LA. The annual event raises awareness for the Chrysalis organization, which aims to create a better life for homeless and low-income families through job stability. Jennifer walked the red carpet without her significant other, Ben Affleck, though he did sneak inside and was spotted chatting up Vince Vaughn. Twilight's Ashley Greene decided on a bright shade of coral for the uplifting event after choosing a bright pink Michael Kors cocktail dress at last week's CFDA Awards. Olivia Wilde arrived solo before accepting an award from her Cowboys and Aliens director Jon Favreau. She tweeted her thanks to Jon and the organization, and was still reeling over her encounter with LL Cool J, who was also in the audience. Ryan Phillippe did a quick change and arrived in a well-tailored suit after spending the afternoon with his dog watching Deacon's flag football game alongside Reese Witherspoon and Jim Toth. Newly engaged Molly Sims stepped out on the arm of her fiancé Scott Stuber, showing off her gorgeous engagement ring. Chrysalis board member Rebecca Gayheart was joined by her Grey's Anatomy star husband Eric Dane while single lady Jamie-Lynn Sigler arrived in a sexy floral dress. Brothers and Sisters star Dave Annable escorted Odette Yustman and caught up with former costar Balthazar Getty who was joined by his wife Rosetta.