क्यों! हो गया ना...

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

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