The court agreed that the law could apply to situations like the one Judd faced, when she was dealing with Weinstein but not working for him.
"Weinstein was uniquely situated to exercise coercive power or leverage over Judd, who was a young actor at the beginning of her career at the time of the alleged harassment," US District Judge Mary Murguia wrote in the opinion. "Moreover, given Weinstein's highly influential and 'unavoidable' presence in the film industry, the relationship was one that would have been difficult to terminate 'without tangible hardship' to Judd, whose livelihood as an actor depended on being cast for roles."
Judd's lawyers made it explicit when she filed the lawsuit that she was suing in part to broaden the use of the law to protect against predatory relationships in Hollywood, and praised the 9th Circuit decision Wednesday.
"This is an important victory not only for Ms. Judd but for all victims of sexual harassment in professional relationships," Judd's attorney Theodore Boutrous Jr. said in a statement.
"The court correctly holds that California law forbids sexual harassment and retaliation by film producers and others in powerful positions, even outside the employment context, and we look forward to pursuing this claim against Mr Weinstein at trial."
An email seeking comment from Weinstein's attorney, Phyllis Kupferman, was not immediately returned. Kupferman said previously that Weinstein did not hurt Judd's career but promoted it, approving her for roles in two of his films.