The first song of Sanjay Leela Bhansali's magnum opus "Bajirao Mastani" is out.

Titled "Deewani Mastani", the song is set on a grand darbar. Deepika Padukone, who plays the role of Mastani, is madly in love with Bajirao (Ranveer Singh) and expresses her feeling through the song while Kashibai (Priyanka Chopra) silently watches her.

Sung by Shreya Ghoshal and music composed by Bhansali himself, the song looks extravagant with a magnificent royal setting. While Ranveer and Deepika are seen in a never-seen-before avatar, Priyanka, as Bajirao's first wife Kashibai, looks impressive as a traditional Maharashtrian queen.

Bajirao Mastani" essentially revolves around the real life couple of Ranveer and Deepika. However, the story of Baji Rao's troubled first wife Kashibai is also an important part of the film. 

"Bajirao Mastani" also features Aditya Pancholi and Mahesh Manjrekar in important roles and will hit theatres on 18 December, 2015.

The film will clash with Shah Rukh Khan and Kajol starrer "Dilwale" at the box office.