Farhan Akhtar as Karthik

Deepika Padukone as Shonali Mukherjee

Ram Kapoor as Raj Kamath

Shefali Shah as Dr. Kapadia

Vivan Bhatena as Ashish

Vipin Sharma as Karthik's Landlord

Yatin Karyekar as Karthik's Boss at Cochin

Tarana Raja as Neelu Didi

Vinay Jain as Siddharth

Siddhartha Gupta as Young Karthik

Swapnel Desai as Young Kumar

Kanchan Pagare as Peon at ACL Office

Brijendra Kala as Telephone Exchange Clerk

Hansa Singh as Secretary at ACL Office

Khyati Kanchan as Hair Stylist

Vijay Badlani as Colleague at ACL

Suresh Tope as Office Friend

Abhay Joshi as Phone Salesman Mumbai

Vidyadhar Karmakar as Old Man at Ticket Collecting Counter

Jagdish Kansara as Hotel Receptionist

Athar Nawaaz as Customer in Courier Office

Anand Kumar Ekbote as Watchman at Cochin House