After walking the red carpet at the Costume Institute Gala with Kate Moss in her design, Stella McCartney kept the celebrity party going on the West Coast with a screening of The Party. Nicole, Joel, Charlize, and Stuart were just a handful of the stars that came out to watch the movie in Stella's LA boutique. Stella's already set her sights on designing a dress for another starlet who wasn't in the house — she wants to make Scarlett Johansson's wedding gown even though the bride doesn't know it yet. She joked about her vision last night, saying, "You know, some kind of dodgy, black thing. Latex! Latex for Scarlett!" We wonder how Ryan would feel about that.

To see a lot more pictures including Angie Harmon looking cute in color, Eliza Dushku, and Rashida Jones, just read more

Images Include: Amber Valletta, Christian McCaw, Angie Harmon, Stuart Townsend, Charlize Theron, Christian Louboutin, Eliza Dushku, Rosanna Arquette, Nicole Richie, Mika, Stella McCartney, Rashida Jones, Brett Ratner, Anita Briem, Emmanuelle Chriqui, Frankie Rayder, January Jones, Tommy Alastra, Joel Madden