I agree with the writer above. no one else could have done the role better than Sreenivasan. Also Parvathy's role too was commendable. The plot is pretty decent and unique. The comic scene's are well executed and enjoyable. I believe that this is Sreenivasan's debut movie as a director and he has done a very good job on the movie. K.P.A.C. Lalitha and Innocent were good too. The scene where Sreenivasan and Parvathy are in a studio for take photograph is the best scene in the movie. Mamu Koya supported the role pretty well. It's a must watch movie for anyone, be it from the north or from the south.
PS: Been looking for the DVD for the movie, but only thing I could find was a VCD. DVD with subtitles would have helped non-malayalis, but difficult to find.