François Chau is a Cambodian-American actor who has played diverse roles in Hollywood. He has played Chinese, Japanese and Hmong characters in both film and television. Among his remarkable roles were as Dr. Martin Ng in the sci-fi series Gemini Division. He also played Dr. Pierre Chang in the ABC series Lost. Apart from these, he has played one-time roles in multiple shows, including The Unit, NUMB3RS, ER, Baywatch, Alias, Shark, Criminal Minds, and many others. In 2013, he had a role in the movie 21 & Over. More recently, he became known for his recurring character Jules-Pierre Mao in the sci-fi series The Expanse. His latest film role was in the recently released Birds of Prey.