Once Upon ay Time in Mumbai Dobaara! (transl. Once upon a time in Mumbai again; Hindi pronunciation: [doːbaːra]) is a 2013 Indian Hindi-language gangster film directed by Milan Luthria and produced by Ekta Kapoor and Shobha Kapoor. A sequel to 2010's Once Upon a Time in Mumbaai, the film stars Akshay Kumar, Imran Khan and Sonakshi Sinha, with Sonali Bendre in a special appearance. The film's title is an intentional misspelling of "Once upon a time in Mumbai Dobaara", done in accordance with Ekta's belief in numerology and astrology.

Filming began on 27 August 2012 in Mumbai, with filming moving to Oman in September, becoming the first major Indian production filmed in the sultanate. Footage was shot on the beach in Qantab, Qurum, and at the Shangri-La's Barr Al Jissah Resort & Spa in Muscat. The film's visual effects (VFX) were by Reliance MediaWorks, and a team of 40 artists augmented 600 digital shots in one month. The live action sequences were filmed with RED and Arri's Alexa digital motion-picture camera. Once Upon ay Time in Mumbai Dobaara! was well-promoted, and the film's second trailer was shown on prime-time slots on four television channels. Hollywood actor Al Pacino was shown the theatrical trailer for the film.

The film was released worldwide on 15 August 2013, on the eve of Independence Day in India. This was later scheduled to avoid clashing with Shah Rukh Khan's Chennai Express, which was released on 9 August. Once Upon ay Time in Mumbai Dobaara! received mixed to negative reviews from critics, and became a box-office failure, despite grossing ₹91.7 crore against a budget of ₹85 crore.