Prince Chatrichalerm Yukol (Thai: ??????????????????? ????; RTGS: Chatrichaloem Yukhon; born November 29, 1942), or usually known by his nickname Mui (Thai: ????), 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.
Four of his films have been submitted by Thailand for the Academy Award for Best Foreign Language Film: The Elephant Keeper, Song for Chao Phya, Daughter 2 and King of Fire.
In 1981, he was a member of the jury at the 31st Berlin International Film Festival.In June 2012, he was adjudged bankrupt, causing his ongoing film project to be halted indefinitely.