Actor Aamir Khan, who keeps altering his looks according to what his films demand, says he is now on a strict diet to get in shape for a project.Aamir interacted with the media at a Sunday brunch at Mia Cucina here.Asked about how his usual Sunday brunch, he said: "Earlier, I used to do so many things but now I am on very strict diet for my new film. So, I have started getting back into shape."Refusing to disclose the name of the film for which he has started training, Aamir said: "I cannot tell you which one it is but it's for my new film."He was out for a brunch with his daughter Ira Khan.Aamir's last big screen appearance was in "Thugs Of Hindostan".