Kal Ho Naa Ho

Shah Rukh Khan

(Aman Mathur)

Preity Zinta

(Naina Catherine Kapur)

Saif Ali Khan

(Rohit Patel)

Jaya Bachchan

(Jennifer Kapur)

Sushma Seth

(Lajjo Kapur)

Reema Lagoo

(Namrata Mathur)

Athit Naik

(Shiv Kapur)

Delnaaz Irani

(Jaspreet "Sweetu" Kapoor)

Lillete Dubey

(Jaswinder "Jazz" Kapoor)

Sulabha Arya

(Kanta Bhen)

Anaita Shroff Adajania

(Geeta Parekh)

Sonali Bendre

(Dr. Priya)

Shoma Anand

(Kammo)

Satish Shah

(Karsanbhai Patel)

Ketki Dave

(Sarlaben Patel)

Simone Singh

(Camilla)

Rajpal Yadav

(Guru)

Dara Singh

(Pritam Chaddha)

Toni Vitale

(Va Va Voom Girl)

Steve West

(Mike)

Stefanie Samuels

(Bagel Vendor)

Sanjay Kapoor

(Abhay Malhotra)

Kajol

(Special Appearance in "Maahi Ve" Song)

Rani Mukerji

(Special Appearance in "Maahi Ve" Song)

Anil Mehta

(Rajnath Kapur (uncredited))

Joseph Gatt

(Dancer in Club (uncredited))

Uday Chopra

(Day 6 Narrator (uncredited))

Farah Khan

(Jenny's Restaurant Customer (uncredited))

Karan Johar

(Jenny's Restaurant Customer (uncredited))