सदमा

Kamal Haasan

— Somprakash/Somu

Sridevi

— Nehalata Malhotra/Reshmi

Silk Smitha

— Soni

Gulshan Grover

— Balua

Kanwarjeet Paintal

— Paintal

Arvind Deshpande

— J. K. Malhotra

Viju Khote

— Police Inspector David

Birbal

— Shamu

Leela Mishra

— Somu's neighbor "nani"

Ashalata Wabgaonkar

— Rajeshwari Malhotra

Shreeram Lagoo

— Dr. Khandeparkar

Padma Chauhan

— Madam