Shammi Kapoor as Madan
Madhubala as Sangeeta
Nisha Kohli as Sushma
Dharmendra as Police Inspector Sunil Singh
Dhumal as Sampat
Maruti Rao as Sevakram
Mohan Choti as Dance Master
Sunil a Police Inspector is searching for his long lost brother Madan who has been seperated in childhood from his parents Thakur Harchran Singh and Rajni. Madan who is now known as Shyam has become a petty thief and has landed up in jail. After being released from jail he comes to Mumbai. On his way he meets Shantilal an old jail acquaintance. Shantilal asks Shyam to finds his two daughters Sushma and Sangita whom he had abandoned when they were kids.
Shyam soon finds Sushma and Sangitha. Sangitha is working on a play called 'Boy Friend' which does not have a male lead. The story continues with how Shyam becomes the male lead of the play and how all meet in the end.