Watch the third dialogue promo from PK

The third dialogue promo from PK is out! In this promo, Aamir Khan says that he is an astronaut by profession. With PK release round the corner, the mystery surrounding Aamir's role in PK still continues as it is still not clear whether Aamir is playing an alien or an astronaut in the film.

PK is set to hit the screens on December 19.

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