They were shooting for wedding song titled "Ay sakhi sajan", composed by A.R. Rahman and penned by Irshad Kaamil.
Filmed on real locations, the song features the entire cast of the film, including Dhanush, Sonam, Swara, Abhay Deol and Zeeshan Ayyub.
"I remember being very nervous while shooting because for the first time I was doing a proper choreography in a sari… choreographer Caesar was a darling and his assistant Tina took me through the entire song.
"Interestingly, it was Sonam who came to my rescue with tips and easy advice on the steps during the shoot," Swara said in a statement.
"That's the best thing about shooting with Sonam, she's so warm and interactive that there is no possibility of stress during filming... I enjoyed the song a lot," she added.
The actress, last seen in "Aurangzeb", said even Abhay helped her while shooting one of the sequences.
"There was a sequence where I had to interact with Abhay and he joked and said: 'Here's an easy trick to look comfortable. Just flirt with me in the shot.' Good advice I'd say! It worked," she said.
"Raanjhanaa" is releasing June 21.