Aamir Khan has confessed he keeps the costumes of all the characters he plays in films, even the clapboards.

Aamir has kept the costumes of Rancho, the character he essayed in the superhit '3 Idiots', as well as the clapboards, as he has done for all his films.

"You know I keep the clapboards of all my films. On the last day of the shoot, I collect it, even the costumes, " Aamir told reporters at the DVD launch of "3 Idiots" at Grand Hyatt here Friday.

Asked if he would produce Marathi films, he said: "I would be happy to produce Marathi films. The story and script should touch my heart. Language is not the problem. I would love to produce Gujarati, Bhojpuri.

The beauty of our country is that we have around 22 languages and in every language we make films and there are television channels in every language, which you won't find in anywhere else. I would be happy to make films in other language also."

The superstar said he wishes he could have shown "3 Idiots' to his favourite directors -Guru Dutt, Mehboob and Raj Kapoor.

"Guru Dutt, Mehboobji and Raj Kapoor, I would have liked them to see this film (3idiots), " Aamir said.

In the last 10 years, the actor has give some major hits like "Lagaan: Once Upon a Time in India" (2001), "Dil Chahta Hai" (2001), "Rang De Basanti" (2006), "Fanaa" (2006), "Ghajini" (2008).

The actor maintains that every film is a collective effort and the key person is the director of the film.

"One thing that all should remember is that the main thing of a film is the collective effort, and the most important person of a film is the director. Till now if so many of my films have become successful, its bigger share of credit goes to the director.

"Like in '3 Idiots' Raju (Rajkumar Hirani), Abhijat (Joshi) have a huge contribution, after that we all have put in our best, that's why you liked '3 Idiots' so much. So I don't solely take the credit behind the success of the film, it's a collective effort of every single person associated with the film."