Saathiya (transl. Companion) is a 2002 Indian Hindi-language romantic drama film directed by Shaad Ali and produced by Mani Ratnam and Yash Chopra under the banners, Yash Raj Films and Madras Talkies. It is a remake of the Tamil film Alaipayuthey (2000), whose climax was inspired by the English film Sliding Doors (1998). The film stars Vivek Oberoi and Rani Mukerji in lead roles with Sandhya Mridul, Tanuja, Swaroop Sampat, Satish Shah, Sharat Saxena and Kunal Kumar.

Saathiya revolves around Aditya and Suhani, who despite opposition from their parents, elope and marry. Their happiness is short lived when a tradegy strikes. The soundtrack of the film was composed by A. R. Rahman, while the lyrics were written by Gulzar. The cinematography is done by Anil Mehta, while the film is edited by A. Sreekar Prasad.

Upon release, the film received critical acclaim, with praises for its performance and screenplay. The film was a success earning ₹291 million (US$3.5 million) and became the eighth highest grossing film of the year.

Saathiya received several accolades. At the 48th Filmfare Awards, the film received 8 nominations and won 6 awards, including Best Actress – Critics for Rani Mukherji, Best Screenplay for Mani Ratnam and Best Male Playback Singer for Sonu Nigam, for the song "Saathiya".