Riven

Kamal Haasan

as Rajaraman Venkatraman (Vasool Raja)

Prakash Raj

as Dr. Vishwanathan

Prabhu

as Vatti

Sneha

as Janaki Vishwanathan (Paapu)

Nagesh

as Sriman Venkatraman

Rohini Hattangadi

as Kasturi

Crazy Mohan

as Professor Margabandhu

Karunas

as Amit

Jayasurya

as Zakir

Malavika

as Priya

Ajay Rathnam

as Medicine Professor

Kavithalaya Krishnan

as Surgery Professor

Nithin Sathya

as Neelakandan

Chitra Lakshmanan

as Dr. Kalidas

Thalaivasal Vijay

as Doctor

Santhana Bharathi

as Gangadharan

Kaaka Radhakrishnan

as Margabandhu's father

A. K. Veerasamy

as Hospital cleaner

Madhan Bob

as Mani Raja

Vaiyapuri

as Piles Patient

E. Ramadoss

as Ward Boy

Karate Raja

as Raja's sidekick

Sampath Ram

as Raja's sidekick

Meera Krishnan

as Mani Raja's wife

Kaajal Pasupathi

as Nurse

Boys Rajan

as Professor

Yatin Karyekar

as Anand

Thiruppaachi Benjamin

as Pickpocket

Scissor Manogar

as

Ragasiya

as Dancer in the song "Cheena Thaana"

Kamal Haasan

Playback Singer

Bharathwaj

Original Music Composer

Vidhu Vinod Chopra

Original Story

Rajkumar Hirani

Original Story

KK

Playback Singer

Sadhana Sargam

Playback Singer

Sathyan Mahalingam

Playback Singer

Grace Karunas

Playback Singer

Bharathwaj

Playback Singer

Hariharan

Playback Singer

Shreya Ghoshal

Playback Singer

Vairamuthu

Lyricist

Saran

Director

A. Venkatesh

Director of Photography

Crazy Mohan

Dialogue

K Murari

Executive Producer

Mohana Mahendran

Art Direction

Suresh Urs

Editor

A Manohar Prasad

Producer