क्यों! हो गया ना...

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

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