Abhishek Bachchan as Lallan Singh

Ajay Devgn as Michael Mukherjee

Vivek Oberoi as Arjun Balachandran

Rani Mukerji as Sashi Biswas Singh

Kareena Kapoor Khan as Meera

Esha Deol as Professor Radhika

Om Puri as Prosenjit Bhattacharya

Anant Nag as IAS Avinash Balachandran

Vijay Raaz as Dablu

Sonu Sood as Gopal Singh

Saurabh Shukla as Dr. Gopal

Karthik Kumar as Vishnu

Abhinav Kashyap as Trilok

Paras Arora as Arun Balachandran

Loveleen Mishra as Shobha

Tanushree Chakraborty as Arjun's Classmate

Simran as Michael's Friend

Lekha Washington as Girl at Embassy