The film was originally titled Villain, however due to the fact that Arjun Rampal held the rights for that title, the title was changed to Ek Villain.
The first film having Siddharth and Ritiesh in different roles against their image.
The film is a remake of I Saw The Devil(2010) but there changed many portions of the film to suit Indian sensibilities.
The glowing beach shown in Galliyan song is Maldive's Vadhoo island beach. It dazzles at night due to natural phenomenon known as bioluminiscence caused by planktons.
The title "Ek Villain" was registered with Rajiv Rai. He gave the rights away as a kind gesture .
The sequel of the film has been finalized with John Abraham and Aditya Roy Kapoor replacing Sidharth Malhotra and Ritesh Deshmukh as the main leads