Here are the things Aamir Khan did for his roles in films:
• Ear piercing for Lagaan
• Learned painting for Taare Zameen Par
• Every birthday he undertakes to learn something new (learned marathi, learned to cook with mom, etc.)
• He became known with the film ‘Qyamat se Qyamat Tak’. The budget for this film was lower, so he and another man put up the movie posters on buses and auto rickshaws.
• To shoot a song for the film, Baazi, he had his whole body waxed.