Ek Duuje Ke Liye (transl. Made For Each Other) is a 1981 Indian Hindi romantic tragedy film directed by K. Balachander. A remake of Balachander's Telugu film Maro Charitra, it stars Kamal Haasan and Rati Agnihotri as a pair of lovers from different families who oppose their relationship, and go to dire lengths in an attempt to break them apart. It features Madhavi and Rakesh Bedi in supporting roles.

Ek Duuje Ke Liye was released on 5 June 1981, and grossed over ₹10 crore (US$1.3 million) at the box office, making it one of the highest-grossing Indian films of its year. It received positive reviews from critics, who praised the film's score—particularly the single "Tere Mere Beech Mein" sung by S. P. Balasubrahmanyam and penned by Anand Bakshi—and the performances of the cast. At the 28th National Film Awards, it won Best Male Playback Singer (S. P. Balasubrahmanyam). At the 29th Filmfare Awards, it received a leading 13 nominations—including Best Film—of which it won three awards: Best Lyricist (Bakshi), Best Screenplay (Balachander) and Best Editing.

Ek Duuje Ke Liye is regarded as a "classic film" in Hindi cinema, and one of the best Hindi-language films of all time. It has inspired several Indian and Western actors and singers, such as Britney Spears, who notably sampled instruments from "Tere Mere Beech Main" for her 2004 single "Toxic".