क्यों! हो गया ना...

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

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