Om Shanti Om (Hindi: ओं शान्ति ऒं, Urdu: اوم شانتی اوم) is a 2007 Bollywood film directed and choreographed by Farah Khan. It stars Shahrukh Khan and Deepika Padukone in the lead roles as the protagonists while Shreyas Talpade, Arjun Rampal, and Kirron Kher feature in supporting roles. Arjun Rampal is the antagonist in the movie. Nearly thirty five stars from yesteryear and today are referred to or show up during the duration of the film, including thirty one of them (not including the stars of the film) in one song alone.

Farah Khan wanted singer Shakira (I) to make a special appearance in this film by performing a song. Farah choreographed Shakira's 2006 MTV Music Video Awards performance and knew that she was a huge Bollywood fan. Due to scheduling, Shakira was not able to participate in the film.

Farah Khan was originally going to make a film called "Happy New Year." The film was to be a romantic comedy set at New Year's Eve and would star Shahrukh Khan, Juhi Chawla, Raveena Tandon, Amitabh Bachchan, Manisha Koirala, Sanjay Dutt, Zayed Khan and Priyanka Chopra. However, due to the actors' scheduling conflicts, she scrapped the idea and chose another concept based on/inspired from various 1970s films.

Composer A.R. Rahman was meant to compose the songs for this film, but had to decline due to other commitments.

The title of the film is taken from a 1970s-style disco song in Subhash Ghai's Karz (1980). Ghai himself makes an appearance in this film.

Shahrukh Khan's character Om Prakash Makhija is named after 1970s actor Om Prakash (I).

Shanti's film is called "Dreamy Girl," after Dream Girl (1977), the 1970s hit that took Hema Malini to super-stardom (and also landed her with her iconic nickname of Dream Girl).

The yesteryear cars used in the film originally belonged to Rajesh Khanna and Hema Malini.

The song "Dard-E-Disco" was originally to be shot with only Shakira (I), but her upcoming concert tours rendered her unavailable. Then Farah Khan recalled a promise Shahrukh Khan made to her when shooting the song "Jiye Jale" in Dil Se.. (1998): that if he would show his abs for another film, it would be for a film she was directing. She called upon his promise, and he shot for the song.

It was director Farah Khan's desire to bring Sanjay Dutt, Shahrukh Khan, Aamir Khan, Salman Khan (I) and Saif Ali Khan together on screen for the first time ever. However, Aamir Khan was unable to shoot for the film, since he was busy shooting his film Taare Zameen Par (2007).

Actress Deepika Padukone's first Hindi film.

Dev Anand was approached to make an appearance in the film, but he made it clear that he does not believe in blink-and-miss special appearances.