"If you have Sunny Leone in your film, it cannot happen that you don't have something sexy about her. But she is not just a prop or background or eye candy to look pretty (in the film)," Gustad said.
"I have actually given her a role where she is playing a kind of femme fatale... She is the actual mastermind of all the 'jhol' (mischief) in the film. I've tried to portray her in a very intelligent way," he added.
'Jackpot', set in Goa, also features Naseeruddin Shah and Sachiin Joshi. It marks the Bollywood debut of Tamil actor Bharat.
The director is impressed with Sunny's hard work and said that it's always nice for a filmmaker to work with actors who are as dedicated as her.
"What I liked about Sunny is her determination and hard work. I found it very refreshing. She is always on time, always ready, waiting and listening and wanting to do more," Gustad said.
Sunny made her Bollywood debut with 'Jism 2'. She rose to popularity in India after her stint on the fifth season of TV reality show 'Bigg Boss'.