Bal took to the stage from the front during the end of the show and started dancing towards Sonam, who was standing at the back, inviting her to join along.
They later together made their way to the front in typical Bollywood 'Latkas and jhatkas', making everyone cheer and whistle for them.
Bal's choice of sensuous Bollywood numbers were the high point of his show as the audience hummed along while watching his Indian-Elizabethan inspired collection.
The designer chose a white-golden mulmul lehenga for Sonam, whose look was inspired by a typical mughal bride.
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Her thick maang-tika on the side of her hair parting along with one on the forehead complimented her Indian look "I feel beautiful".
There was only one song from 'Bombay' which was contemporary.
"I always wanted to act in films which had this kind of music. But it was enough for me to walk, listen and be a part of it in some creative way," Sonam said.
Bal's grand setting of the ramp was another eye-catching feature as it was decorated with his trademark lotus, which were lit when the show began.
His collection titled 'The Mulmul Masquerade', had a lot of intricate gold Kasab Kashmiri embroidery on handmade fabrics like chanderi, voils, mulmul and velvet.
The designer used a lot of Black in his collection, which is usually not an Indian bridal choice.
His colour palette also included red, white, and ivory.