Jessicas Alba and Biel joined Jennifer Connelly, who are all faces of Revlon, in NYC on Saturday for the brand's Run/Walk For Women, which aims to raise money to research women's cancers. Last year's event brought out Halle Berry, while this year's trio of hostesses was accompanied by Jimmy Fallon. We love seeing celebs out supporting great causes, but we're equally excited to see some of these same ladies trade their workout clothes for ball gowns at tonight's Costume Gala.

To see more from the event, including Ciara and Fran Dresher, just


Images include: Ciara, Fran Drescher, Jennifer Connelly, Jessica Alba, Jessica Biel, Jimmy Fallon