Jennifer Lawrence has a lot more to say about the gender pay gap in Hollywood.

The "Joy" star made a surprise appearance at the Ninth Annual Women in Film Pre-Oscar Party -- presented by Max Mara, BMW, M.A.C. Cosmetics, FIJI Water and Perrier-Jouët -- at Hyde On Sunset in West Hollywood, California, on Friday, where she was all smiles while continuing her fight for equal pay.

NEWS: Jennifer Lawrence Donates $2 Million to Kentucky Children's Hospital

Click here to subscribe to FOX411’s YouTube channel

Dressed in a Dior Haute Couture embroidered off-white wool jacket and a black knitted silk dress, the 25-year-old actress took the stage with Women In Film LA president Cathy Schulma. Lawrence spoke right after Patricia Arquette gave a speech about her change.org/era petition, which was created to urge lawmakers to vote to ratify the Equal Rights Amendment.