Lincoln Davies, former boyfriend to Dawn Dunning, was called as a prosecution witness at Weinstein's New York trial on Thursday.

Davies' evidence followed emotional testimony by Dunning and another aspiring actor on Wednesday that accused the former Hollywood producer of preying on their vulnerabilities while pushing the notion that sex could lead to stardom.

Dunning also said Weinstein put his hand up her skirt and fondled her genitals, but her former boyfriend said she never told him about that.

Also taking the witness stand was the manager of the celebrity hangout where former cocktail waiter Tarale Wulff alleged Weinstein masturbated in front of her on a secluded terrace.

Maurizio Ferrigno testified he saw Weinstein and Wulff heading up a stairway, but conceded on cross-examination that prosecutors helped jog his memory of the moment, which Wulff says happened about 15 years ago.

The experiences of Dunning and Wulff, who also claims Weinstein raped her in his Soho apartment in 2005, are not part of the underlying criminal charges against Weinstein.

However their testimony could be a factor in whether he goes to prison at the end of his trial.

Weinstein, 67, is charged with forcibly performing oral sex on Mimi Haleyi, at the time a Project Runway production assistant, in 2006.

He is also charged with raping another aspiring actor in 2013. That woman could testify later this week.

Weinstein has insisted any sexual encounters were consensual.

Australian Associated Press