Bachna Ae Haseeno (transl. Watch Out, Beauties) is a 2008 Indian Hindi-language romantic comedy film directed by Siddharth Anand, who previously directed Salaam Namaste (2005) and Ta Ra Rum Pum (2007). Produced by Yash Raj Films, the film stars Ranbir Kapoor, Bipasha Basu, Deepika Padukone, and Minissha Lamba in lead roles. The title of the film was taken from the popular song "Bachna Ae Haseeno" from Hum Kisise Kum Naheen (1977), which starred Kapoor's father, Rishi Kapoor.

Bachna Ae Haseeno was released on 15 August 2008, on the 61st Indian Independence Day, and grossed ₹61.57 crore worldwide, becoming the eighth-highest grossing Hindi film of 2008. It received mixed-to-positive reviews from critics upon release, who praised its soundtrack, cinematography, and costumes, along with major praise directed towards Basu's performance.

At the 54th Filmfare Awards, Bachna Ae Haseeno received 3 nominations – Best Supporting Actress (Basu), Best Male Playback Singer (KK for "Khuda Jaane") and Best Female Playback Singer (Shilpa Rao for "Khuda Jaane").