Sinha took to Twitter to "raise a toast" to the amazing progress of the trailer which was released Jan 10.
"Is it okay to raise a toast in the afternoon? A toast to 1.5 million YouTube views of 'Gulaab Gang' trailer in four days," Sinha posted on the microblogging site Tuesday.
Starring Madhuri Dixit and Juhi Chawla, "Gulaab Gang" talks about pink sari-clad women activists who protest against the social injustice against women in the Bundelkhand region of central India. Madhuri will be seen in a fiery avatar and has action scenes as well while Juhi plays a politician.