Naan Sigappu Manithan

Rajinikanth

Professor Vijay / Robinhood

K. Bhagyaraj

CID Chinna Salem Singaram

Ambika

Uma

Sathyaraj

Mohanraj

Sumathi

Vijay's Sister

Nizhalgal Ravi

Ravi

Y. G. Mahendran

Police Inspector

Venniradai Moorthy

M. N. Nambiar

Senior Police Officer

Thengai Srinivasan

Minister Tambaram Thanga Kannan

S. A. Chandrasekhar

Mental Hospital Ward Boy

Senthil

Senthil

V. Gopalakrishnan

V. S. Raghavan

Judge

Veera Raghavan

Justice Veeraraghavan

Babloo Prithiveeraj

Swaminathan

Student

T. K. S. Natarajan

Kovai Sarala

Vijay

Child Artist (Uncredited Role)