Alaap (lit. Prelude) is a 1977 Indian musical drama film directed by Hrishikesh Mukherjee and produced by N. C. Sippy and Mukherjee. It stars Amitabh Bachchan, Rekha, Chhaya Devi, Asrani, Farida Jalal, Om Prakash, Lily Chakravarty and Manmohan in the lead and Sanjeev Kumar in a small role.

Upon release, Alaap failed to do well commercially owing to its depressing theme and Bachchan's "Angry Young Man" image at that time, but attained cult status in later years and is regarded as one of Mukherjee's most underrated works. At the 25th Filmfare Awards, Jaidev was nominated for Best Music Direction.

The film is available for digital streaming on Amazon Prime Video and SonyLIV.