The film, also starring Deepika Padukone, is about Ved (Ranbir), who loses himself in the process of confirming to the standards set by himself and his family. Deepika's Tara enters his life to remind him of his true self and helps him realise his potential.
"Tara is an Indian woman rooted in our value system but she is very modern in her approach. Imtiaz goes back to the time of Radha-Krishna.
"Radha sacrificed herself because she knew Krishna had potential and she told him 'You go, be yourself, even though you don't want to be with me but I will sacrifice my love for you because you can become something'. I think he was really inspired by that and the character of Tara is also based on that," Ranbir said in an interview here.
"'Tamasha' is about Ved, who is not doing what he wants to do. There is a lot of pressure from him, from his family to be a certain person and he starts losing himself in the process and he starts becoming somebody that he is not.
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"He requires a Tara in his life to pull him out of that situation and make him understand the person that he really is. This is a story which is very relevant and I think people will relate to Ved and Tara," she said.
"It is an Imtiaz Ali film at the end of the day and it is an intense and passionate love story but it is also told in a very entertaining manner. It is very relatable," Deepika said.
This is the first time Ranbir and Deepika are working with Imtiaz together. While Ranbir worked with the director in 2011 movie "Rockstar", Deepika has collaborated with Imtiaz on two films-- "Love Aaj Kal" and Cocktail".
Ranbir feels female characters in Imtiaz's films are different from those in other movies.
The on-screen couple said they feel lucky that they never had to compromise on their wishes to comply to the expectations of their family.
"We have been fortunate that we have families, who have been supportive of our career decisions. He, of course, comes from a film family so his parents are proud that he has become an actor but I am sure if he wanted to do something else, they would have supported him in that too. I don't come from a film family but my parents support my choice.
"Tamasha" releases November 27.