Contrary to popular perception, the iconic yell "Yahoo!!" in the famous song from this movie was not rendered by Mohammad Rafi. Shammi Kapoor revealed in an interview it was writer Prayag Raj who happened to be in the studio, and gave that memorable exclamation.
Lata Mangeshkar before recording the song ehsan kiya first she wanted to meet Saira Banu to talk to her and she wanted to hear talk then while recording the song Lata made her voice sound like Saira Banu.
This movie was first offered to Jagdeep before played by Shammi Kapoor. Jag deep 'Surma Bhopali' from Sholay fame famous for comic role did some serious role in his early movies.
Debut of Saira Banu.