The 48-year-old Moss, Depp's former girlfriend, is scheduled to make an appearance by video link on Wednesday, the New York Post reported.
That reference provided an opening to Depp's lawyers to call Moss as a witness to address the allegation. The Texas-born Heard countersued, asking for $100 million and claiming she suffered "rampant physical violence and abuse" at his hands. Depp said the tip of his middle finger on his right hand was severed when Heard threw a vodka bottle at him while the couple were in Australia, where he was filming the fifth installment of the "Pirates" franchise.David Spiegel, a psychiatrist, testified that Depp had "narcissistic traits" and behavior that indicated he had a substance use disorder.
Depp's lawyers put experts on the stand earlier in the trial who testified that the actor lost millions because of the abuse accusations, including a $22.5-million payday for a sixth installment of "Pirates."