क्यों! हो गया ना...

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

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