Imran's dear mamu Aamir Khan made sure that he had a grand launch in Bollywood. So Imran Khan is trying hard to now return the favour.

The lad is not charging any money for Aamir's next home production 'Delhi Belly' in which he plays the lead role. The movie is currently on the floors.

Imran calls his decision to do the movie for free is his way of saying thank you to his mamu Aamir. He's mighty grateful to mamu dearest for giving him a grand launch with the superhit 'Jaane Tu Ya Jaane Na' in July. He could show off all his skills with the film.

Aamir had slogged hard and had gone through a lot to promote the film and make sure it is widely accepted by the audiences.

Imran very well understands the fact that no producer would do for actors what Aamir did for him.

Now Imran is making sure that he pays back by working for free and not letting himself be treated as a star on the sets of the film.

The word is that he travels economy class with the film's crew and expects no special comforts that others in the unit don't have. He says it's more like a homecoming for Imran after doing 'Kidnap' and 'Luck' with outside banners.

This mama-bhanja jodi really get along like a house on fire and can do anything for each other.