Entertainment Movies Kate Moss to Testify in Johnny Depp, Amber Heard Defamation Trial After Heard's 'Stairs' Remark Amber Heard previously referenced "Kate Moss and stairs" as she testified about an alleged altercation between her sister and Johnny Depp By Jen Juneau Jen Juneau Twitter Website Jen Juneau is a News and Movies Staff Writer at PEOPLE. She started at the brand in 2016 and has more than 15 years' professional writing experience. People Editorial Guidelines and Nigel Smith Published on May 23, 2022 12:15PM EDT Share Tweet Pin Email Kate Moss is set to testify in the ongoing defamation trial between Johnny Depp and Amber Heard. A source close to Depp, 58, confirms to PEOPLE that the supermodel, 48, will speak to the court in Fairfax, Virginia, via video link on Wednesday. Moss, who is Depp's ex, was referenced by Heard, 36, earlier this month during the latter's time on the stand, while discussing an alleged altercation between Depp and Heard's sister, Whitney Henriquez. The Aquaman 2 actress said Henriquez was near a staircase "in the line of fire … trying to get Johnny to stop," which reminded her of a rumored incident between Moss and Depp. "[Whitney's] back was to the staircase, and Johnny swings at her," Heard testified. "I don't hesitate, I don't wait — I just, in my head, instantly think of Kate Moss and stairs." For more on the Johnny Depp-Amber Heard trial, listen below to our daily podcast PEOPLE Every Day. "And I swung at him," Heard continued of the alleged March 2015 incident between herself, Henriquez and Depp. From left: Johnny Depp, Kate Moss, Amber Heard. EVELYN HOCKSTEIN/POOL/AFP via Getty; Taylor Hill/Getty; JIM LO SCALZO/POOL/AFP via Getty Johnny Depp and Amber Heard's Relationship Timeline "In all of my relationship to date with Johnny, I hadn't landed a blow," she said. "And I, for the first time, hit him — like, actually hit him. Square in the face." Heard added, "He didn't push my sister down the stairs." (Henriquez, 34, testified later that Depp once hit her and then "repeatedly" struck Heard, who allegedly defended Henriquez in the incident.) A rep for Moss has not responded to PEOPLE's request for comment. Depp's lawyers were spotted fist-pumping when Heard mentioned Moss' name during her testimony, presumably because it gave them the opportunity to bring in the model as an impeachment witness to dispel the rumored incident. Johnny Depp; Amber Heard. Jim LO SCALZO/POOL/AFP/Getty (2) Heard first made the Moss staircase allegation during her testimony at Depp's U.K. defamation trial in 2020, according to The New York Post. "I remembered information I had heard [that] he pushed a former girlfriend — I believe it was Kate Moss — down the stairs," Heard previously testified while describing the same fight involving her sister and Depp. "I had heard this rumor from two people and it was fresh in my mind." Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human-interest stories. Johnny Depp and Kate Moss. Jim Smeal/WireImage Why Johnny Depp Didn't Look at Amber Heard During Her Testimony Moss and Depp called it quits in 1997 after four years of dating and a rumored engagement, but later appeared together briefly at the Cannes Film Festival in May 1998. At 5:30 a.m. on Sept. 13, 1994, Depp was arrested and charged with criminal mischief at New York's Mark Hotel for allegedly trashing his hotel room. Police reported they found Depp "in a state of possible intoxication" and Moss uninjured. A criminal-court judge dismissed the charge against Depp on the condition that he stay out of trouble for six months. Depp paid the Mark close to $10,000, including more than $2,000 for damages, plus the bill for the remainder of his reservation. Moss said in a 2012 interview with Vanity Fair that she cried for "years" after their relationship ended: "There's nobody that's ever really been able to take care of me. Johnny did for a bit. I believed what he said. Like if I said, 'What do I do?', he'd tell me. And that's what I missed when I left. I really lost that gauge of somebody I could trust." RELATED VIDEO: Amber Heard References "Kate Moss and Stairs" as She Testifies About Johnny Depp and Sister's Fight Depp is currently suing Heard for defamation, arguing that her 2018 op-ed for The Washington Post about surviving domestic violence tarnished his reputation and ruined his career opportunities, even though she didn't mention him by name in the article. He testified that after Heard's allegations against him, he lost "nothing short of everything." He and Heard married in 2015 and split in May 2016, when Heard sought a domestic violence restraining order against him, accusing him of abusing her. Depp denied the claims, and the former couple settled their divorce out of court in August 2016. Depp, who has said multiple times under oath that he has never struck Heard or any woman, has testified that his "goal is the truth" as he seeks to clear his name in the trial, which is being televised live via various outlets. When Heard took the stand, she told the jury, "I struggle to find the words to describe how painful this is. This is horrible for me to sit here for weeks and relive everything." Back in November 2020, Depp lost his highly publicized U.K. libel lawsuit case against British tabloid The Sun for calling him a "wife-beater." The court upheld the outlet's claims as being "substantially true" and Heard testified to back up the claims. In March 2021, the star's attempt to overturn the decision was denied. If you are experiencing domestic violence, call the National Domestic Violence Hotline at 1-800-799-7233, or go to thehotline.org. All calls are toll-free and confidential. The hotline is available 24/7 in more than 170 languages.