- Cast: Tony Jaa, Sorapong Chatree, Sarunyu Wongkrachang, Nirut Sirichanya, Dan Chupong, Santisuk Promsiri, Primorata Dejudom, Natdanai Kongthong, Patthama Panthong, Petchtai Wongkamlao, Supakorn Kitsuwon
- Director: Tony Jaa
- Writers: Panna Rittikrai, Ek Iemchuen, Tony Jaa
- Producers: Panna Rittikrai, Tony Jaa, Prachya Pinkaew
- Executive Producer: Somsak Techaratanaprasert
- D.O.P.: Nattawut Kittikhun
- Editor: Marut Seelacharoen
- Production Design: Ek Iemchuen
Set in the regal times of King Naresuan, Tien (Tony Jaa) is a man who was born into nobility but had it stripped from him after his parents were brutally murdered. During his childhood Tien learned Khon, a form of dance which is usually reserved for royalty. Although he didn't know it yet, Khon would later prove to be an invaluable aide to him. After seeing his parents murdered at the tender age of 10, Tien is forced to live on the streets where he is eventually captured by a group of thieves who take him in and teach him how to steal and fight.
Tien's expertise as a thief and fighter grows and it isn't long before he is made head thief. Then Tien sees something that makes his stomach churn. A competition is being held to find the best knights to serve under the very man who had killed Tien's parents all those years ago. Tien passes the tests easily and is made Lord Rachasana's 2nd Knight. Now, he has his opportunity to strike but he will have to use all his skill and ingenuity if he is going to get his revenge on the man who killed his parents.
- Aspect Ratio: 2.35:1
- Filming Locations: Thailand
- MPAA Warning: Sequences of violence
- Production Budget: THB 300,000,000
- Production Companies: Iyara Films, Sahamongkol Film International
Initially claimed to be a sequel to 2003's "Ong-Bak: Muay Thai Warrior", Ong Bak 2 was then announced to be a prequel to its predecessor.
Unlike its predecessor, which had a contemporary and realistic setting, Ong Bak 2 is actually set in ancient Thailand and as such, could be described as a historical epic with elements of fantasy combined, and has nothing to do with Ong-Bak: Muay Thai Warrior.
Ong Bak 2 also has nothing to do with Jaa's 2005 film Tom-Yum-Goong, which was sometimes incorrectly labelled Ong Bak 2 in the West, as well as The Protector and The Warrior King.
The Cambodia scenes has been cut out from the original version due to recent clashes between Cambodian and Thailand over the Preah Vihear temple.