Prince Chatrichalerm Yukol (; ; born November 29, 1942), or usually known by his nickname Mui (), is a Thai film director, screenwriter and film producer. A prolific director since the 1970s, among his films is the 2001 historical epic, "The Legend of Suriyothai". A member of the Thai royal family, his official royal title is Mom Chao, or M.C., the most junior title still considered royalty. For "Suriyothai" as well as his 2007 historical epic, "King Naresuan", Chatrichalerm was backed by Queen Sirikit.