Ranbir is happy that Mohit has sung for him in his forthcoming "Barfi" too.
"'Barfi' is a very special film and it release Sep 14. Mohit babajee (Mohit Chauhan) has sung the title song 'Aala re Barfi' and I am very happy. A singer generally doesn't get the credit for the importance he brings to the career of an actor," the 29-year-old said here in an interview.
"But if you look at late singers Mohammad Rafi, Mukeshji, Kishore Kumar, they used to add a lot to an actor's career. So I am grateful to Mohit babajee for giving me such a good song again in 'Barfi'," he added.
Recently, megastar Amitabh Bachchan too said that playback singers play an important role in building an actor's stature in Indian cinema.
When asked how tough was it to emote only with actions in "Barfi", Ranbir said: "It's very easy. If you are at a noisy place and if your friend is standing at around a distance of 20 feet then how would you tell him that I am thirsty or I need to pee or I want to watch 'Gangs of Wasseypur'? You'll use physical actions or your eyes."
"I am an actor and I should know how to act not just with my face but my body also. So I didn't do any character or in-depth study," added the 29-year-old who plays a deaf-mute boy in the film.