Aamir Khan, the king of marketing, is back with his latest release 3 Idiots. This time, Aamir is promoting the film by travelling in disguise to various cities. Now the latest we hear is that the actor was spotted in Mamallapuram near Chennai.

This time, the versatile actor befriended a tourist guide. Guess what? When Aamir revealed who he was, the tourist guide was not aware of the actor and had very little knowledge about Bollywood films. As a parting gift, the actor presented the guide with a gold ring.

Aamir also had plans to visit the Military Officer's Training Academy in Chennai. But sources say that the Central Government declined his request.

Other stars in the movie include Madhavan, Sharman Joshi, Kareena Kapoor, Boman Irani and others.