Amanda Seyfried's new film Lovelace can now go ahead with its US opening on August 9, after a judge cleared it for release.
The biopic, which stars Amanda as Deep Throat porn actress Linda Lovelace, was hit with a copyright lawsuit by Arrow Productions, who own the rights to the original film.
They tried to block the release because more than five minutes of footage from the classic 1972 porn movie was used without a license or permission. But a federal judge cleared the film for release.
Millennium president Mark Gill said: "We are relieved that common sense prevailed. The suit was completely unwarranted. We believe this case was an insult to the legal safeguards in place maintaining our right to freedom of speech. It was without merit on every level."
He added: "Arrow Productions' complaint was transparent about its desire to control discussion about Deep Throat - a film they describe as a 'watershed' in American popular culture - and to hinder projects that would compete with theirs. The law does not support either of these motives."
The biopic, directed by Rob Epstein and Jeffrey Friedman, also stars Peter Sarsgaard, Adam Brody, Sharon Stone, Chris Noth and James Franco.
Radius co-presidents Tom Quinn and Jason Janego added: "Radius couldn't be more pleased the world will finally get a chance to see Linda's real story unfold on screen in Lovelace. Never again will she be silenced by the producers and distributors of Deep Throat."
Lovelace will open in the UK on August 23.