Kaun (Hindi: कौन, English: Who's There) is a 1999 Hindi suspense thriller directed by Ram Gopal Verma, written by Anurag Kashyap, and starring Urmila Matondkar, Manoj Bajpai and Sushant Singh. Other titles for the film were Evaru (Telugu title) and Thriller (English title). The movie defines modern Indian screenplay with mind-bending twists. Irrespective of the commercial success, the film remains as a classic example of suspense in Indian cinema. It was also hailed to be much ahead of its time, courtesy Ram Gopal Varma and Anurag Kashyap.

[Spoiler Alert] The film features a man claiming to be a white collar worker (Bajpai) and another man claiming to be a police inspector (Singh), both attempting to get into the house of a young woman (Matondkar). Kaun was an inventively minimalistic film using only one set and a cast of three actors (excluding a dead body and a brief appearance of a room full of silent, motionless extras). The only costume change occurs in the film's final scene when Matondkar reappears the following morning.

Kaun could refer to one of the following:

A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects. The process of filmmaking has developed into an art form and industry.

Films are cultural artifacts created by specific cultures, which reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment and a powerful method for educating – or indoctrinating – citizens. The visual elements of cinema give motion pictures a universal power of communication. Some films have become popular worldwide attractions by using dubbing or subtitles that translate the dialogue into the language of the viewer.

Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement.

Manoj Kumar (born Harikrishna Giri Goswami on 24 July 1937) is an award-winning Indian actor and director in the Bollywood film industry. He is known for acting in and directing films with patriotic themes, and has been given the nickname "Mr Bharat" (Bhaarat is the Hindi term for India). In 1992, he was honoured with the Padma Shri by the Government of India.

Manoj Kumar was born in Abbottabad, a town of Khyber-Pakhtunkhwa, then part of India. Abbottabad is now located within the borders of Pakistan. His original name was Harikishan Giri Goswami. When he was 10, his Gosain Hindu family had to move to Delhi owing to partition. His family lived as refugees in Vijay Nagar, Kingsway Camp and later moved to Patel Nagar area of New Delhi.

After graduating from Hindu College, University of Delhi, he decided to enter the film industry.

As a youth, he admired Bollywood superstar Dilip Kumar, and decided to name himself Manoj Kumar after Dilip's character in Shabnam (1949).

After making a little-noticed début in Fashion in 1957, Manoj landed his first leading role in Kaanch Ki Gudia (1960) opposite Sayeeda Khan. Piya Milan Ki Aas and Reshmi Roomal followed, setting the stage for the Vijay Bhatt-directed Hariyali Aur Raasta (1962) opposite Mala Sinha. Kumar then appeared with Sadhana in Raj Khosla's Woh Kaun Thi (1964), and reunited with Vijay Bhatt and Mala Sinha in Himalaya Ki God Mein (1965).

Lata Mangeshkar (born September 28, 1929) is a singer from India. She is one of the best-known and most respected playback singers in India. Mangeshkar's career started in 1942 and has spanned over six and a half decades. She has recorded songs for over a thousand Hindi films and has sung songs in over thirty-six regional Indian languages and foreign languages, though primarily in Hindi. She is the elder sister of singer Asha Bhosle, Hridayanath Mangeshkar, Usha Mangeshkar and Meena Mangeshkar. She is the second vocalist to have ever been awarded the Bharat Ratna, India's highest civilian honour.

Mangeshkar was featured in the Guinness Book of World Records from 1974 to 1991 for having made the most recordings in the world. The claim was that she had recorded approximately 25,000 solo, duet, and chorus-backed songs in 20 Indian languages between 1948 to 1974. Over the years, while several sources have supported this claim, others have raised concerns over its veracity, claiming that this number was highly exaggerated and that Mangeshkar's younger sister, Asha Bhosle, had more song recordings than she had. In 2011 Guinness officially acknowledged Bhosle as the most recorded artist in music history.