In spite of doing a wide variety of roles in his illustrious career, Bollywood superstar Amitabh Bachchan still hopes to do roles that will challenge him as an actor.

"I don't know what is there for me in the future. But I think there are roles that will challenge me as an actor," he told reporters here, when asked whether he still dreamt of doing any particular role.

Bachchan, his son Abhishek and daughter-in-law Aishwarya, were in the city tonight to promote Ram Gopal Varma's new film 'Sarkar Raj'.

Talking about the movie, he said Varma has proved that a film can do well commercially though it did not have typical song and dance sequences.

Film critics in western countries earlier used to criticise Indian films for their song and dance numbers but now they have come to accept it, he said.

Varma said coming to the PVR cinema at Punjagutta Circle for the event was an emotional moment for him as he was born and brought up in the locality.

He said 'Sarkar Raj' proved that a film can do well at the box office without necessarily having comedy scenes and song and dance items.

He thanked the Bachchans for doing a great job in the film.

Asked to comment on Amitabh Bachchan and Abhishek's performance, Aishwarya said Bachchan senior is an institution onto himself and still has the attitude of a student towards work, while Abhishek too worked with total commitment.

The cast of 'Sarkar Raj' and the director were in the city as part of the 'Idea Yatra for Sarkar Raj'.