Lindsay Lohan's naked woes

It was announced earlier this week the troubled actress is to appear opposite male porn star James Deen in the film - about five twentysomethings' quest for power, love, sex and success in modern Hollywood.

But even though she's already whipped off her top for Playboy, she is concerned about 'full frontal nudity'.

A source told Radaronline.com: "Lindsay and her team are concerned about the nudity that is involved.

"Lindsay would be required to do full frontal nudity, and the sex scenes are very, very graphic."

The source continued: "Yes, Lindsay has posed nude for Playboy, but she needs to make sure she is comfortable with it, and this is something she can handle as an artist.

"It's expected that Lindsay will sign the contract in the next two weeks, as filming begins at the beginning of July."

The Mean Girls actress was said to be attracted to the project because it will mean she gets to work with director Paul Schrader, who wrote Raging Bull and Taxi Driver and author Bret Easton Ellis, who wrote the script.