Kaho Naa... Pyaar Hai (transl. Say It... You're In Love) is a 2000 Indian Hindi-language musical romantic thriller film written, directed and produced by Rakesh Roshan. The film stars debutants Hrithik Roshan and Ameesha Patel, alongside Anupam Kher, Dalip Tahil, Mohnish Bahl, Ashish Vidyarthi, Satish Shah, Farida Jalal, Asha Patel, Rajesh Tandon and Tannaz Irani. Upon its release on 14 January 2000, the film became an instant blockbuster and earned over ₹800 million (US$17.8 million) worldwide, becoming the second highest-grossing film of 2000 worldwide.

Kaho Naa... Pyaar Hai received positive reviews from critics with praise towards Hrithik Roshan's performance and music, but criticized its "clichéd" plot. Hrithik Roshan became an overnight superstar, where his debut was termed Hrithik Mania and he has been known as the Millennial Superstar. The film went on to be inducted into the Guinness World Records (2002) for being a feature film with the most awards won a total of 92 awards received in numerous ceremonies and categories.

The film would be added to the Limca Book of Records for the greatest number of awards won by a Hindi film. As director and producer, Rakesh Roshan collected his first ever Filmfare Award, while his son became the only actor ever to win both the Filmfare Award for Best Actor and the Filmfare Award for Best Debut for the same film. The film's core concept was inspired from the 1986 Kannada film Ratha Sapthami.

Following the success of Kaho Naa... Pyaar Hai, the father-son duo has gone on to collaborate in many more films, including Koi... Mil Gaya, Krrish, Kites, Krrish 3 and Kaabil.