Leo

Arjun Sarja as Harold Das George Mariyan as Napoleon Madonna Sebastian as Elisa Das Chinmayi Sripaada as Sathya (Voice) Sanjay Dutt as Antony Das Priya Anand as Deepa Andrews Denzil Smith as Judge Madhusudhan Rao as Shanmugan's brother-in-law Ramakrishnan as Gabbi Punya Elizabeth Bose as Sathya's Friend Sandy as Shanmugam's Son Janany Kunaseelan as Shruthi Vaiyapuri as Occult Priest Santhi Mayadevi as Parthiban's Advocate Mansoor Ali Khan as Hridhayaraj D'Souza Vijay as Parthiban / Leo Das Mathew Thomas as Siddharth 'Siddhu' Mysskin as Shanmugan Babu Antony as Antony's henchman Sachin Mani as Shruthi's Husband Leela Samson as Public Prosecutor Dinesh as Das and Co. Member Maya S. Krishnan as Escort Trisha Krishnan as Sathya Kamal Haasan as Vikram (Voice) Gautham Vasudev Menon as Joshy Andrews Anurag Kashyap as Daniel (Uncredited)

Tamil Sakthivel Assistant Editor Dinesh Choreographer Deeraj Vaidy Writer Anirudh Ravichander Original Music Composer, Playback Singer John Wagner Graphic Novel Eka Lakhani Costume Designer Rathna Kumar Writer Vijay Playback Singer Asal Kolaar Playback Singer, Lyricist David Cronenberg Original Film Writer Gopi Prasannaa Publicist Lokesh Kanagaraj Director, Writer