Kamal Haasan as Gunaa

Roshini as Rohini

Rekha as Rosy

Janagaraj as Gunaa's uncle

S. P. Balasubramaniam as CBI officer Ramaiah

Girish Karnad as Doctor Ganesh

Sharat Saxena as Suresh Kumar

Pradeep Shakti as Ismail

Ananthu as Gunaa's cellmate

Sethu Vinayagam as Doctor

Ajay Rathnam as Inspector Moovendar

S. Varalakshmi as Manonmani

Kaaka Radhakrishnan as Madasami

Saritha as Rohini (voice)

R.S. Shivaji as Barber (uncredited)