Let's Talk About Sex: Amanda On 'Lovelace' Nudity

First things first: Amanda Seyfried is perfectly comfortable talking about sex. On August 9, the blonde star goes brunette as notorious '70s adult film star Linda Lovelace in the racy and highly anticipated biopic Lovelace, and she tells ET that she was absolutely fine with the film’s required nudity and sex scenes -- it was the violence that she had a tough time with.

Pics: First Look at Amanda Seyfried as Porn Star Lovelace

"[Sex on camera is] never that intimate. Really, it's not, because there are a lot of people around [on set], and it's not real," Amanda tells ET. "The nudity wasn't scary either. It was just during the violent scenes, being man-handled and stuff like that. ... This is the testament to what really goes on -- what we don't see. What we don't care to see."

Watch the video to get more of Amanda's take on the real person behind the facade, plus what co-stars Sharon Stone, Peter Sarsgaard, Chris Noth, Hank Azaria, Adam Brody and Debi Mazar think of Deep Throat and adult films in general.

Set against the sexual revolution of the 1970s, Lovelace tracks the rise of the legendary Deep Throat star. To the public, she was an enthusiastic spokesperson for sexual freedom and uninhibited hedonism. But behind closed doors, she was used and abused by the porn industry at the hands of her coercive husband, Chuck Traynor (played by Sarsgaard). In time, she learned to take control of her life, and soon changed her tune to reveal that she was actually the survivor of a far darker story.

Video: SJP Talks About Replacing Demi Moore in 'Lovelace'

Directed by Oscar winners Rob Epstein and Jeffrey Friedman (Howl, The Celluloid Closet), Lovelace also stars Wes Bentley, Bobby Cannavale, James Franco, Robert Patrick, Eric Roberts and Juno Temple.