Yeh To Kamaal Ho Gaya () is a 1982 Indian Hindi-language film directed by T. Rama Rao. It has Kamal Haasan in a double role, with Poonam Dhillon in the lead roles and is a remake of his own acted Tamil film Sattam En Kaiyil (1978).
Rasik Bihari Saxena a corrupt lawyer sends the child of thief Shankar Chander to juvenile-jail for committing murder. Shankar abducts one of Rasik's twin children from hospital after their birth. Shankar keeps this boy with him and names him Ratan, Shankar's wife Shanta nurtures Ratan. Shankar teaches Ratan how to steal money, good things etc. from people. On the other hand, Rasik's child is now an adult and his name is Ajay Saxena, he has studied abroad and married a foreign girl. Rasik doesn't like the foreigner girl, seeing this, angers Ajay and he leaves home. Ajay is arrested for being guilty of killing a girl named Ruby Gupta. Knowing this, Shankar tells Ratan to go to Rasik's home and to pretend to be Ajay, Ratan abides by his father. At the end of this film Rasik's wife Laxmi understands that both of the same looking boys (Ratan and Ajay) are actually her own sons.
The film was released on 29 October 1982. It was a box office success and had a theatrical run of 175 days.
The film's music was composed by R. D. Burman and lyrics were penned by Anand Bakshi. Veteran singer S. P. Balasubrahmanyam collaborated with R. D. Burman for the first time in this film. Though the film Mangalsutra was released before a year, where S. P. Balasubrahmanyam sang a song under the music of R. D. Burman.