Rachel Bilson: Ban the Sale of Shark Fins!

Rachel Bilson steps out with a friend for lunch at Mustard Seed Cafe on Monday (June 27) in Los Feliz, Calif.

The 29-year-old actress spent time with her younger half-sisters Hattie and Rosemary the day before while picking vegetables at Underwood Family Farm.

Rachel is lending her name to a great cause these days. She joins Alexander Skarsgard, Ke$ha, Megan Fox, Ian Somerhalder, and Leonardo DiCaprio in supporting the protection of sharks.

A third of shark species are threatened by extinction and up to 73 million sharks are killed each year for use in shark fin soup and other products.

Visit the Humane Society to find out how to help protect sharks!

10+ pictures inside of Rachel Bilson going to lunch…