The movie is set to be released on January 31, 2013.
The film was shot extensively in Kochi.
Mohanlal has been honoured with Padama Shree Award by the Government of India.
Kavya Madhavan is the lead actress opposite Mohanlal.
'Lokpal' revolves around Nandagopal who runs a small restaurant and is a social activist.
'Lokpal' premiere was held at the Kalabhavan theatre in Trivandrum on January 22, 2013.
The film was launched on September 10, 2012 in Kochi.
The music of the film is given by Ratheesh Vegha and the lyrics are written by Rafeeq Ahammed.
The songs of the film- 'Mizhiyithalil','Mayam Mayam', 'Hari Govinda' have become popular among the young audience.
Mohanlal and writer Swamy have worked in 'Naduvazhikal' in the past. The actor-writer duo have also worked in 'Run Babby Run' which was released in 2012. 'Lokpal' is their third film together.
The film revolves around the theme of corruption, however, the makers insist that the movie is not overtly political.
Kavya Madhavan, the leading lady of the film, made her debut as a child artist in 'Pookkalam Varavayi'.
Actor Mohanlal, writer SN Swamy and director Joshiy are working together after 22 years in this film.
Mohanlal has acted in over 300 films in his career. The versatile actor will be seen in 8 different get ups in 'Lokpal'.
Actors Krishna Kumar, Thalaivasal Vijay, Maniyanpilla Raju are also a part of the film.