In November last year, Huerta had alleged that Weinstein raped her twice in 2010.
The complaint claims that Weinstein hired attorney Michael F Rubin to gain information from Huerta, reported Variety.
Rubin apparently also discouraged Huerta to not press charges against Weinstein.
Huerta is represented by attorney Aaron Filler and his firm Tensor Law has filed the lawsuit.
In the lawsuit, Filler claimed that Rubin interfered with his contractual relationship with Huerta, depriving him his legal fees of USD 20 million.
"Every allegation in that lawsuit is false... I don't know Harvey Weinstein. I never met Harvey Weinstein. I had nothing but Paz de la Huerta's interests in mind. This guy is upset he lost a potential client," said Rubin.