What actors and actresses appeared in AK - 2012?

You're likely referring to the Tamil film "A.R. Murugadoss's AK - 47", also known simply as "AK-47".

The main actors and actresses in this film are:

* Ajith Kumar as A.K.

* Nayanthara as Vasundhara Devi

* Daniel Balaji as "Commander"

* Vivek as "Gurusamy"

This film is a Tamil action film directed by A.R. Murugadoss and produced by Sun Pictures. It was released in 2007, not 2012.