Nutan Samarth-Bahl (née Samarth; 4 June 1936 – 21 February 1991), known mononymously as Nutan was an Indian actress who worked in Hindi films. Regarded as one of the greatest and finest actresses in the history of Indian cinema, Nutan was noted for her naturalistic acting in parts of conflicted women often deemed unconventional. In a career spanning four decades, she appeared in more than 80 films, that ranged in genre from urban romances to socio-realist dramas. She was the recipient of seven Filmfare Awards, including five Filmfare Awards for Best Actress. In 1974, Nutan received the Padma Shri, India's fourth highest civilian award.

Born in Bombay to filmmaker Kumarsen Samarth and film actress Shobhna Samarth, Nutan started her career at the age of 14 in the 1950 film Hamari Beti, directed by her mother. She subsequently starred in the films Nagina and Hum Log (both 1951). Her role in Seema (1955) garnered her wider recognition and her first Filmfare Award for Best Actress. She continued playing leading roles through the 1960s until the late 1970s and went onto win the award on four other occasions for her roles in Sujata (1959), Bandini (1963), Milan (1967) and Main Tulsi Tere Aangan Ki (1978). Some of her other films of this period include Anari (1959), Chhalia (1960), Tere Ghar Ke Saamne (1963), Khandan (1965), Saraswatichandra (1968), Anuraag (1972) and Saudagar (1973).

In the 1980s, Nutan started playing character roles and continued working until shortly before her death. She portrayed mostly motherly roles in such films as Saajan Ki Saheli (1981), Meri Jung (1985) and Naam (1986). Her performance in Meri Jung earned her a sixth and final Filmfare Award, in the Best Supporting Actress category. Nutan was married to naval Lieutenant-Commander Rajnish Bahl from 1959 until her death from breast cancer in 1991. Their only child, son Mohnish Bahl is an actor.

Nutan Samarth-Bahl was born on 4 June 1936 in Bombay into a Marathi Hindu family as the eldest of four children to director-poet Kumarsen Samarth and his actress wife and filmmaker Shobhna. Kumarsen was one of the early developers of the Films Division of India. Her maternal grandmother Rattan Bai and her aunt Nalini Jaywant were also actors. She grew up with complexes as she was considered too skinny in her childhood. She had two sisters: actress Tanuja and Chatura and a brother Jaideep. Her parents separated before Jaideep's birth. Actresses Kajol and Tanishaa Mukerji are Nutan's nieces. Her niece Kajol later shared her record for most Filmfare Best Actress wins.

As a child, Nutan went to Villa Theresa School and was later educated at the Baldwin Girls' High School in Bangalore. While she was attracted to the performing arts since childhood and liked singing and dancing, she liked arithmetic and geography at school. She took lessons in classical music for four years under Jagannath Prasad. In 1953, when her film career had already started, she headed to Switzerland for further studies at La Chatelaine, a finishing school. She was sent there at the behest of her mother following Nutan's intensive work in films and major weight loss. She described the one year spent there as the happiest in her life and returned home a year later having gained 22 pounds.

Nutan first appeared briefly in front of the camera as a child in her father's film Nal Damyanti in 1945. She started her career at age 14 by playing the protagonist in Hamari Beti (1950), directed by her mother. She was conflicted during the making of the film, unsure she could pull it off given how critical she was of her appearance and talents. She took part in Snehal Bhatkar's soundtrack for the film, singing the song "Tujhe Kaisa Dulha Bhaaye Re". The film released to considerable attention for Nutan's work. The Motion Picture Magazine gave a scathing review of the film but took note of Nutan's "fine performance", which showed "great promise". She recalled an instance where her relatives changed their mind about her after watching the film: "The relatives who called me ugly changed their opinions overnight. They said they were proud of me."

Ravindra Dave's suspense thriller Nagina (1951) followed, and Nutan's performance in the film gained her greater recognition. The film became her first commercial success. Aged 15 at the time of its release, she was not allowed to attend its premiere as it was certified "A: (restricted for adults) and she was underage. The social drama Hum Log, released the same year, was similarly popular with audiences. Directed by Zia Sarhadi, the film dealt with the trials and tribulations of a middle-class family and starred Nutan as the daughter Paro, an aspiring writer who suffers from tuberculosis. Nagina and Hum Log consolidated her position as a rising star.

The following year, she participated at the 1952 Femina Miss India contest, where she was crowned Miss Mussoorie, before being sent to Switzerland for further studies due to her weight loss and frail appearance.