क्यों! हो गया ना...

Suniel Shetty as Ishaan Om Puri as Mr. Khanna Rati Agnihotri as Sulochana Khanna Gaurav Gera as Vinay Jennifer Winget as Diya's Friend Kajal Agarwal as Diya's Friend Aishwarya Rai Bachchan as Diya Malhotra Vivek Oberoi as Arjun Khanna Rahul Singh as Banna/Ranveer Singh Dia Mirza as Preeti Arjun Mathur as Sumi (cameo) Anupama Kumar Amitabh Bachchan as Diya's Uncle Tinnu Anand as Malhotra

Arjun Mathur Assistant Director Samir Chanda Art Direction Raju Sundaram Choreographer Perry Costello Special Effects Coordinator Vijay Prakash Playback Singer Sunidhi Chauhan Playback Singer Susheel Peris Digital Compositor Milap Zaveri Dialogue, Screenplay Sadhana Sargam Playback Singer Resul Pookutty Sound Designer Ehsaan Noorani Original Music Composer Mahalaxmi Iyer Playback Singer Boney Kapoor Producer Vivek Oberoi Screenplay, Dialogue Javed Akhtar Lyricist Udit Narayan Playback Singer Loy Mendonsa Original Music Composer, Playback Singer Javed Ali Playback Singer Vaibhavi Merchant Choreographer Shankar Mahadevan Playback Singer, Original Music Composer Sudeep Chatterjee Director of Photography Shaan Playback Singer Dominique Cerejo Playback Singer