The ladies were there to support their movie Carol. The night before, they attended a SAG-AFTRA Foundation conversation at the Pacific Design Center to promote the film as well.
Rooney was nominated for an Oscar a few years ago for her work as Lisbeth Salander in The Girl with the Dragon Tattoo and she still wants to play the character again in the planned sequel.
FYI: Rooney is wearing an Alexander McQueen jacket and dress. Cate is wearing Armani Prive with Casadei shoes and Neil Lane jewelry.
Rooney Mara Still Wants to Play Lisbeth Salander Again!
Source: Just Jared