Jaane Tu... Ya Jaane Na (transl. Whether You Know Or Not) is a 2008 Indian Hindi-language coming-of-age romantic comedy film written and directed by Abbas Tyrewala and produced by Mansoor Khan and Aamir Khan under Aamir Khan Productions, with Ajay K. Bijli and Sanjeev K. Bijli of PVR Pictures acting as co-producers. The film stars Imran Khan (in his film debut) and Genelia D'Souza with Prateik Babbar (in his film debut), Manjari Fadnis and Ayaz Khan.

Jaane Tu... Ya Jaane Na follows the lives of two best friends Jai and Aditi. They refuse to have romantic feelings but realise their love for each other once they start dating different people. It marked Tyrewala's full-fledged screenwriting and directorial debut. The film's soundtrack was composed by A. R. Rahman with lyrics written by Abbas Tyrewala.

The film was theatrically released on 4 July 2008, and proved to be a major commercial success at the box office. Jaane Tu... Ya Jaane Na received positive reviews from critics, with praise towards its direction, story, screenplay, soundtrack, cinematography and cast's performances.

At the 54th Filmfare Awards, Jaane Tu... Ya Jaane Na received 12 nominations, including Best Film, Best Supporting Actress (for Pathak Shah) and Best Supporting Actor (for Babbar), and won 4 awards, including Best Male Debut (for Imran Khan) and Best Music Director (for Rahman).