[7] Mitra started his acting career with the theatre group Lalkuthi.

[7] Mitra converted to Islam from Hinduism and adopted the name Hasan Imam during his marriage in 1972.

[10] He lost his wife, Ajanta Mitra, in 2000 and his youngest son, Samiul Islam, in 2012.

[12][13][14] As a Muslim, his funeral and burial were conducted according to Islamic rites.

The first namaz-e-janaza for the veteran actor was held at the Film Development Corporation (FDC) after Zuhr prayers.