The filmmaker is in awe of the Brazilian model of Indian descent.
"I never ever hid the fact that I am a devotee of a woman`s beauty. But not only in my entire career, but never even ever since I have consciously come of a mental and a physical age to perceive and admire the beauty of a woman, have I seen a woman more beautiful than Nathalia," he said.
"Her beauty is truly electrifying and it just sparks out from every nook and curve of both her face and her body. Her face looks so classically beautiful and her body literally looks like the perfect embodiment of an ultimate female figure.
"This combined with her ability on cue to give any expression that is asked of her is what I think will happen in only once in a decade and in this decade I think Nathalia is that girl," he added.
Nathalia will shake a leg on item song "Dan dan" in the film, which also stars Rana Daggubati and Sanjay Dutt.
Earlier Sunny was expected to do the song.
"We were trying for Sunny Leone but by God`s grace it didn't work out or else we would have lost out on someone as divine as Nathalia and I thank God for that," Varma wrote on his Twitter page.