Ajay Devgan: Puneet Puneet is a thirty something writer who lives with his wife and son in a cozy little apartment in Mumbai. After years of toiling in the snaky labyrinth of the television world, he has finally got his dreams break he is going to write a film! He and his family are thrilled that top stars will be mouthing his lines. Just as he is dreaming of the riches and the glamour, the sudden and unannounced arrival of a dogmatic long lost uncle spirals his life completely out of control. He is forced to go against his placid and unassuming nature and devise schemes to get rid of him, further sending him into a tailspin of misery. Now, this is one happy ending which even he is finding difficulties in scripting!

Konkona Sen Sharma: Munmun Munmun is the twenty seven year old wife of Puneet. She works as an interior designer and is a sweet and accommodating person who not only places a high premium on traditional family values, but is also ambitious and career oriented. Hence, the arrival of Chachaji places her under considerable duress and she copes with it with admirable gusto, validating the fabled multi-tasking ability of women. But when Chachaji idiosyncrasies become unbearable, she puts her foot down and asks Puneet to get rid of him.

Paresh Rawal: Chachaji Lambodar Bajpai (a.k.a Chachaji) is a 65 year old man from a small village in North India who is visiting his distant nephew Puneet and his family in Mumbai. An extremely eccentric, head strong and opinionated person, he is often appalled with the ways of the modern city folks. He can be unpredictable, goofy and mercurial, but is also loving, warm and has a genuine concern for the people around him. He has voluntarily made himself comfortable in their home and is blissfully unaware of the schemes being designed to hasten his departure!