The 35-year-old actress said her role in the neo-noir drama-thriller is on the lines of a Samaritan, but the setting of the movie is dark.
"I play a doctor in the film. It's (the role) very simple and nice, good Samaritan kind of a thing. But the whole atmosphere of the film is so nice and dark that the role is very different," Kareena told PTI.
Interestingly, the '3 Idiots' actress played a doctor before also in films like Salman Khan starrer 'Kyon Ki' (2005), 'Kambakkht Ishq' and 'Agent Vinod', opposite Saif Ali Khan in 2012.
'Udta Punjab', directed by Abhishek Chaubey, is being made after four years of research and is based around the drug-related problems prevalent in Punjab.
Kareena said the movie is starkly different from her upcoming film 'Ki & Ka'.
"'Udta Punjab' will be totally different from 'Ki & Ka' because this is lot more fun, quirky and entertaining. 'Udta Punjab' will be dark, gritty, edgy kind of a film," she said.
The film, scheduled to release in June, also stars Alia Bhatt, Shahid Kapoor and Prabhjyot Singh.
Punjabi actor Diljit Dosanjh will be seen opposite the "Bajrangi Bhaijaan" actress.
Kareena made her film debut in 2000 with JP Dutta's 'Refugee' and went on to work in films ranging from multi-starrer 'Kabhi Khushi Kabhie Gham', to crime-drama 'Omkara' and 'Jab We Met', a romantic-comedy.
The actress, who earlier used to feature in four-five movies every year, has slowed down her work and is seen doing one-two films per year, which she terms intentional.
"It is a conscious decision, yes. I want to do something which is great, something that I love, which will get me excited to go to the studio and do it. So, it is going to take a lot out of me to say yes," she said.
Her next film "Ki & Ka" opposite Arjun Kapoor is slated to release on April 1.
