Boman and Farah, who are teamed up for the Sanjay Leela Bhansali's home production, are shooting for the special song at Yash Raj Studio here.
"We are shooting for the song for 'Shirin Farhad Ki Toh Nikal Padi'. There are two aliens, one is Farah and other is me. It is a promo song being choreographed by Geeta Kapoor, to which we are dancing," Boman told reporters today at a promotional event of another film 'Joker' produced by Farah Khan.
"The movie is complete. The movie is looking great and I hope everyone has loved the trailer which is out now," he said.
When asked if he was finding it difficult to match steps with Farah, Boman said, "Well, I think I am better than her in dancing".
Directed by Bhansali's sister, Bela, the romcom is slated for an August release.
At the promotional event of 'Joker' which was held outside Yash Raj studio, Boman was accompanied by three 'aliens'.
The actor was seen shaking a leg with the trio to the tunes of 'Shirin Farhad Ki Toh Nikal Padi' and 'Sheila Ki Jawani'.
'Joker' is directed by Farah's husband Shirish, and stars Akshay Kumar and Sonakshi Sinha in lead.
The film will hit the screens on August 31.