क्यों! हो गया ना...

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

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