Aamir Khan has proved his acting prowess a lot of times with his past projects. Be it playing a rural guy in 'Lagaan', a cop in 'Sarfarosh', a teacher in 'Taare Zameen Par', two extremist roles in 'Ghajini' or a college student in '3 Idiots', he has proved not only his versatility with these diverse roles but he has also made these characters unforgettable for the audiences.

Now, with 'PK', he has surpassed them all by essaying the character of an Alien. Incidentally Aamir is the first Indian to play an alien on screen and successfully so.

Everyone has been telling the actor that while we have seen some phenomenal performances delivered by him, he has outdone himself in 'PK'. He went to great lengths for the prep to play this challenging character that has no references.

Everyone has been raving about Aamir`s performance in the film and has been undoubtedly tagged as the best performance in his entire career which says a lot. We have even heard Aamir say that this was the most challenging role in his entire career.