Prem's princess of hearts and lil' sister became besties while promoting Sooraj Barjatya's fantasy family drama last Diwali. And the bonding continues. Sonam Kapoor and Swara Bhaskar let their hair down on Saturday night at Aparna Purohit's suburban residence. Swara's brother, Ishaan, had flown down from Delhi a day earlier to plan a surprise 28th birthday bash for his sis. The party got going at 9 pm and went on all night. “It was an intimate affair with 20 guests and lots of naach gana. Sonam walked in at around 10 pm and stayed on for three hours, mingling with her Prem Ratan Dhan Payo co-star Deepak Dobriyal, actor Pankaj Tripathi, screenwriter Himanshu Sharma and filmmaker Avinash Das among others.“

Composer Rohit Sharma with friend Mayank Saxena, played the djembe and crooned folk songs. The Punjabi tracks and the dhol got everyone dancing. The two sahelis shook a leg to the PRDP title track, Sallu's “Aaj Unse Milna Hai“ as also Anil Kapoor's evergreen “My Name is Lakhan“.

Swara had cut one birthday cake earlier in the evening with the media while promoting her upcoming drama Nil Battey Sannata. Ishaan got her another chocolate cake. The buffet included vegetarian Biryani, fried chicken, cornballs and paneer kebabs. “Sonam stuck to wafers and was among the first friends to wish Swara on her b'day,“ informs a guest.