The 23-year-old actress - who is due to star as porn star Linda Lovelace in `Inferno` - says the film is not an indecent representation of the notorious actress, who made her name in the movie `Deep Throat`.
Lindsay said: "I`m playing Linda Lovelace, who was the first globally recognised porn star. We follow her through her ups and downs and show what really went on in her life.
"The way that Matthew Wilder, the director wants to shoot it, is not vulgar.
"It`s not about the raw sex and the shots of her fully nude. It`s more about getting into her psyche and seeing how scared she was. That`s what I want to show most in the film."
The `Mean Girls` star also claims the movie is a big departure for her from the teen roles so many recognise her for.
She told the Sydney Morning Herald: "People are going to say, `Oh, LindsayLohan is doing a porno.` But it`s not like that.
"I`ve never played someone`s true-life story before. A lot of the other movies I did were just brainless for me. So it`s nice to play something where I`m able to experience all these different emotions."