Kamal Haasan as Thenali Soman

Jayaram as Dr. Kailash

Devayani as Jalaja

Jyothika as Janaki

Delhi Ganesh as Dr. Panchabhootam

Charle as Kanthaswamy

Ramesh Khanna as Dr. Panchabhootam's Assistant

Madhan Bob as "Diamond" Babu

Crane Manohar as Servant

Lavanya as Raj TV Reporter

Bayilvan Ranganathan as Police Inspector

Mayilsamy as

Anoop Kumar as

Meena as Self (Cameo)

K. S. Ravikumar as Self (Cameo)

C. R. Vijayakumari as Mental Patient (Cameo)

B. H. Abdul Hameed as