Mumbai-based celebrity nutritionist Rujuta Diwekar has directed the film.
"I am super excited that Kareena, Karisma and Saif are all part of the film. It's a casting coup of sorts," Diwekar said in an statement.
"What is more important is that we are sharing our common belief that eating right, eating local, seasonal, fresh and tasty food is integral to looking good, feeling light and happy. And like Saif often says - happy people are most attractive, not skinny," she added.
Diwekar is a nutritionist who takes care of many celebrity clients.
Richa Chadda and Anupam Kher are also part of the film.