Actor Abhishek Bachchan hopes his upcoming film "Guru" will be his best ever and says ace director Mani Ratnam is truly inspiring.

"Mani Ratnam always inspires you not only by his work but also the kind of work he takes out of you. I was not confident when he offered me Lallan Singh's role in 'Yuva' but I will always respect Mani for having confidence in me - which I didn't have in myself at that time," Abhishek said at a press conference here Sunday.

Asked which film he rated as his best, Abhishek said none of them could fit the bill.

"I hope Guru does that. It was challenging to play the journey of a man which starts at age 15 and goes on till 70," he remarked.

Ratnam, who was also present at the conference, said essaying the role of 'Guru' was a big responsibility.

Quizzed about Abhishek's growth as an actor, Ratnam replied: "You don't make an actor. An actor is there ... you just have to give him the opportunity and chance to show his skill. He always has the capability. 'Guru' is a huge role and it is a huge responsibility as well and Abhishek is okay in the film."