क्यों! हो गया ना...

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

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