KKC is  story about Nikhat(Soha Ali Khan) and her entry into bollywood. The tale starts from her teens - how she has a troubled childhood, how she is cajoled by her mom to be in movies. Its pretty interesting and fast moving. There are several independent figures like Prem(Rajat,Reigning superstar); Vinay Phatak,  Khosa (a typical Film producer), Ratanbala (Reigning star actress), Zafar(shiney) - upcoming script writer. Each one of them has an interesting story. Of course the stories mingle in the character's love and work life. Portrayal of some of the aspects of life is pretty neat - how people use others to forge his/her goals, and how this is fine to everyone!!; how people move on .. . The movie continues to showcase how soha is used by others(prem,zafar, her mom/step-dad,first producer), and how she uses others. Zafar is soha's main love interest and there (obviously) tensions between them over their career paths. Lots of ups/downs in the movie - but in the end zafar makes a blockbuster with nikhat .....

The first half is interesting, but movie becomes little expected and sluggish in the second half. 

Acting wise - everyone was good. rajat,soha,ratnabala,khosa(producer). Somehow I dont like shiney that much :). Film has good actors. Characterization of each individual is  good - the producer, the stars , the strugglers - all of them are potrayed in apt terms. Screenplay is nice too. Director created the era of 60s pretty nicely - Songs, Sets, Costumes, Dialogue - all of these create a different era altogether- amazing feat.

Songs are pretty neat, and fit in nicely with the movie.

Overall, I would give it 3.5 stars. its watchable once. I am not rating it too high because I find the second half of story sluggish and little inconsistent.