Superstar Aamir Khan's forthcoming film "PK" is the talk of the town, thanks to its first poster. And now the film's team is set to release the second one on Independence Day. Directed by Rajkumar Hirani, the second poster will be launched Aug 15, read a statement. "PK" also features actor Sanjay Dutt, Anushka Sharma and Sushant Singh Rajput.