The duo would spend their day at home on the eve and later join other celebrities in the evening at Bachchan's house.
"We will celebrate Diwali with our family in the day, do the Lakshmi puja and then at night, we all are heading to Mr Bachchan's party," Ranbir, who was in the capital yesterday to celebrate the festival with the media, said in an interview.
Meanwhile, Deepika said that she wants to go to Benguluru to spend a few hours with her family and then fly back to Mumbai.
Dressed in a red-and-white Payal Jain saree, Deepika struck a stunning picture, while her "Tamasha" co-star Ranbir Kapoor looked dapper in a red Rohit Bal kurta-pyjama combined with a half jacket.
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When asked if her celebrations are any different from a North Indian, the Bengaluru girl said, "I don't know how it is done in North India or any part of the country but the day is different like it is a day before for us than what it is for others.
Sharing about his father Rishi Kapoor's insistence on burning two sparklers since Ranbir was a child, the actor said, "For me Diwali has been the same since I was born. We go to RK studios, do the Lakshmi puja there, we distribute gifts to the staff.
"We go to our grandmother's house, take her blessings, exchange gifts, entire family comes together. We then come back home, do our puja. My father insists we burn at least two sparklers that's a tradition he believes in, he said.
Before interacting with the media, the actors lit diyas, tried their hand in making rangoli and played cards.
The much-loved on-screen couple looked relaxed, comfortable and in festive mood as they joked around with the reporters.
The duo also did an impromptu jig to their "Tamasha" song "Matargashti".
Director Imtiaz Ali's "Tamasha" releases November 27.