Ong-Bak, one of the films that have promoted Muay Thai and Muay Boran.In 2004, Muay Thai boxer Asanee Suwan was named best actor at the Thailand National Film Association Awards for his portrayal of Parinya Charoenphol (affectionately known as Nong Thoom in Thailand) in Beautiful Boxer. The movie tells the true-life story of a man who masters Muay Thai in order to realize his dream of becoming a woman.
The 1971 Shaw Brothers Studio film, Duel of Fists, is set in Bangkok's Lumpini Boxing Stadium and stars Ti Lung as a Muay Thai boxer who is the long-lost brother of a Hong Kong martial artist, portrayed by David Chiang.
Recently the films Ong-Bak, Tom-Yum-Goong (The Protector in the US, Warrior King in the UK), and Born to Fight helped to popularize Muay Thai. Ong-Bak demonstrates some techniques of the older style of Muay Thai - Muay Boran and Tom-Yum-Goong illustrates the fighting style of the Thai Royal Bodyguards (Jaturongkabaht, circa 1400-1700s) - Muay Koshasan (Elephant Boxing style). Muay Koshasan is also known as Muay Chang Tumlai Roang - (Smashing Elephant Boxing style) in that it emphasizes a lot of throwing, crushing, and breaking of joints and limbs.
The film Kickboxer starring Jean Claude Van Damme was a film set in Thailand and based on the sport of Muay Thai. Van Damme's portrayal in this film should not be taken as an accurate depiction of Muay Thai.
The film Muay Thai starring Jason Willis is set in Evansville, Indiana, about one of the best upcoming Thai fighters in 2006.
The film Chok Dee starring Dida Diafat who plays himself in this semi-fictional story of his life. The film covers a lot of the training that is used in the camps in Thailand.
The Oxygen channel original reality-documentary Fight Girls featured seven women training to become Muay Thai competitors.
The History channel took a deep look into the history and fighting techniques in Muay Thai on their show Human Weapon

Other

In Capcom's Street Fighter video game series, the character Sagat is a Muay Thai master and a national hero in Thailand.
In the Japanese Super Sentai Jyuken Sentai Gekiranger, GekiViolet's fighting style is very similar to Muay Thai.