Main Roles:
* Dev Patel as Jamal Malik
* Freida Pinto as Latika
* Saurabh Shukla as Prem Kumar
* Anil Kapoor as "The Host" / "The Game Show Host"
* Madhur Mittal as Salim
* Ayush Mahesh Khedekar as Young Jamal
* Tanay Chheda as Young Salim
* Rubina Ali as Young Latika
Supporting Roles:
* Daya Naidu as Javed
* Rajesh Tailang as Maman
* Ashutosh Gowariker as "The Police Inspector"
* Irrfan Khan as "The Game Show Host" (voiceover)
* Mahira Kakkar as "The Girl in the Train"
This list highlights the main actors who played significant roles in the film, including both adults and children who portray the characters at different ages.