This film was supposed to be Anu Malik first release as music composer. Instead Harmesh Malhotra started another film Poonam with Anu Malik composing music. When Mangal Pandey was released some of Anu Malik's films were already released.
When this film was in the making, Ajit who was playing the villian of the film, had already retired and moved to his home town, bur he had completed work in Mangal Pandey.
Mangal Pandey has Anu Malik's best song with Lata Mangeshkar, the song, nasha jo hai....
Harmesh Malhotra was the first major filmaker to sign Anu Malik to compose music for his 4 films, Poonam, Aapas Ki Baat, Mangal Pandey & Phaansi Ke Baad.
Deb Mukhejee grabbed hold of Anu Malik at a party and threaten to bash him up. This was due to a song in Mangal Pandey sounding the exact same as a song in Karate.Deb felt Anu lifted the tune from Karate. Anu Malik explained that Bappi Lahiri and he both copied the same English song.