Kate Moss scheduled to testify in the Depp v Heard trial

The supermodel dated Johnny Depp in the 1990s

US actors Johnny Depp and Benito Del Toro with model Kate Moss at a screening of the film 'Fear and Loathing in Las Vegas' at the 51st Cannes film festival. AFP

Inquiring minds want to know what Kate Moss might say about her relationship with Johnny Depp. WireImage

Johnny Depp waves to fans from the back of his vehicle. AFP

A fan of Depp wears ribbons in a show of support. AFP

Depp fans continue to congregate outside the Fairfax County Circuit Court in Fairfax, Virginia. AFP

Depp and Amber Heard's friend, iO Tillet Wright, said that Depp used derogatory words for his fan base, calling them 'remoras, which is a type of suckerfish that attaches itself to the hull of a ship and puts a hole in it and then sinks it'. AFP

A rare supporter of Heard outside the Virginia courthouse. AFP

Throughout the six-week trial, most of the fans outside the courtroom have come to support Depp. AFP

The trial is on its 20th day of evidence. AFP

A social media expert said that during Depp's London trial against 'The Sun', every tweet with the hashtag #justiceforjohnny contained negative language concerning Heard. AFP

Depp has made a point to acknowledge his fans in the courtroom. AFP

The defamation case brought on by Johnny Depp may get even more star power on Wednesday with an appearance by Depp’s former girlfriend, Kate Moss.

Avid trial watchers know that the names of other luminaries such as James Franco, Billy Bob Thornton, Elon Musk and Paul Bettany have already been part of testimony.

Kate Moss is due to give evidence by videolink in Johnny Depp’s defamation case against his former partner Amber Heard.

And it was Depp’s former wife Amber Heard who dropped the British supermodel’s name while on the stand earlier in the trial when describing a moment of alleged abuse.

Kate Moss at the Burberry fashion collection, unveiled in London, UK. AP

“All I could think about was Kate,” Heard said, prompting Depp’s legal team to solicit her testimony, according to various US media outlets.

Moss dated the Edward Scissorhands star from 1994 to 1997 and Heard has previously suggested that Depp pushed the supermodel down a flight of stairs.

Depp filed a lawsuit against Heard over an opinion piece she wrote for The Washington Post in December 2018 in which she described herself as a "public figure representing domestic abuse”.

His lawyers questioned experts earlier in the trial who testified that the actor lost millions because of the abuse accusations, including a $22.5 million pay out for a sixth instalment of Pirates of the Caribbean.

Heard’s lawyers countered by questioning experts and friends who testified that Depp was his own worst enemy and that the article had nothing to do with his tarnished star.

Dr David Spiegel, a psychiatrist, testified on Monday that Depp had "narcissistic traits" that included lacking empathy.

Dr Spiegel said Depp was envious or jealous of Heard, exploitative and that he carried a sense of entitlement — traits that can result in “intimate partner violence”.

James Franco and Amber Heard at the premiere of 'The Adderall Diaries' at the 2015 Tribeca Film Festival. Heard said her ex-husband, Johnny Depp, 'hated' Franco. Photo: FilmMagic

Heard said that being cast with Franco caused her ex-husband to become violent. Reuters

Depp with his friend, rock singer Marilyn Manson in 2001 in Los Angeles, California. AFP

Manson was dropped by his record label after his ex-fiance, actress Evan Rachel Wood, accused him of sexual and other physical abuse. AP

Heard dated Elon Musk after her divorce from Depp. AFP

Heard said that she met Musk and his mother, supermodel Maye Musk, at the Met Gala in New York in 2015. AFP

Actress Winona Ryder began dating Depp when she was only 17 years old. Depp once had a tattoo that read: Winona Forever. New World Pictures / Getty Images

Moss and then-boyfriend Johnny Depp at the premier of 'Fear and Loathing in Las Vegas' in 1998. EPA

Heard said that actor Paul Bettany witnessed her ex-husband passed out while working together. Sarah Dea / The National

Heard said that she thought Depp might 'accidentally' kill her. AP

Heard said that she has lost work because of Depp's lawsuit. Reuters

Heard said that she only wanted to go on with her life and wished that Depp would, too. Getty Images

Aaron Eckhart and Heard star in 'The Rum Diary', an adaptation of the book by Hunter S Thompson. She met Depp on set. Photo: FilmDistrict

Heard, seen here at the Met Gala, said that Depp was supposed to attend with her and failed to show up. Reuters

Heard filed a restraining order against Depp and then for divorce. EPA

When cross-examined, Depp’s lawyers tried to discredit the psychiatrist by saying that he could not possibly make that diagnosis without interviewing the actor personally.

“I requested meetings with him and was denied,” Dr Spiegel said.

Depp already lost one case of libel against the Sun, a British tabloid that called him a “wife beater”.

Heard, who had a starring role in Aquaman, did not name Depp in the article and is counter-suing for $100m for "rampant physical violence and abuse" suffered throughout their relationship.

Depp at Disney World in Orlando, Florida, promoting the 'Pirates' franchise. Photo: Andy Templeton

Depp backstage with members of the stage production of 'Edward Scissorhands' at the Ahmanson Theatre in Los Angeles, California. Photo: Technologik

Depp fired the bulk of his long-time representation in 2016 and sued many of them. Photo: Vanessa Lua

Depp and his 'Pirates of the Caribbean' co-star Penelope Cruz. Photo: Eric Charbonneau / WireImage

Depp reportedly punched a location manager on the set of 'City of Lies'. Photo: Celebrity ABC

'The Lone Ranger' was a Hollywood disaster on many levels. Photo: Inside the Magic

Depp's star began to fade years before his wife wrote an op ed for 'The Washington Post' on domestic abuse. Photo: Alli Kwong

Heard filed an order of protection against Depp after filing for divorce. Photo: Technologik

Depp has been an international star for more than 40 years. Photo: Loren Javier

Depp's film about Whitey Bulger underperformed at the box office. Photo: Asim Bharwani

Depp often plays with his band, the Hollywood Vampires, in small clubs in Los Angeles, California. Photo: Starbright31

Depp told the court that he would 'never damage his own finger' as he loves playing the guitar. Photo: Starbright31

Depp often played at his own club, the Viper Room. Photo: Starbright31

Depp appears at a Disney theme park. Photo: Loren Javier

Depp put his handprints and footprints at the famous Grauman's Chinese Theatre. Photo: Loren Javier

Depp's character from 'Dark Shadows' appears on the side of a building in New York. Photo: Brecht Bug

Depp was in 'Fantastic Beasts: The Secrets of Dumbledore' but said he was forced to exit the franchise. Photo: Gage Skidmore

Johnny Depp with actor David Hasselhoff (C) and his long-time friend Bruce Witkin who testified on behalf of his ex-wife Amber Heard. Photo: Hollywood Vampires Facebook

Entertainment industry veteran Kathryn Arnold said that allegedly defamatory statements made about Heard by Depp's former lawyer, Adam Waldman, have caused significant damage to her career, which was "on the precipice of a meteoric rise" after Aquaman.

“Every time her name is mentioned, the negativity flares up again,” Ms Arnold said. “So her world has been silent in terms of opportunities and even things that she wanted to work on are no longer available.”

Ms Arnold estimates that Heard has suffered between $45m and $50m in lost film and TV roles and endorsements.

Judge Penney Azcarate has scheduled closing arguments in the case for Friday, after which it will go to the jury.

Johnny Depp voiced a character for the Corpse Bride. Warner Bros Entertainment

Johnny Depp in Sleepy Hollow. Paramount Pictures

Johnny Depp in Platoon. Courtesy MGM

Johnny Depp in Benny and Joon

Johnny Depp in Cry-Baby. Courtesy Universal Pictures

Fear and Loathing in Las Vegas.

Johnny Depp in Before Night Falls. Courtesy New Line

Johnny Depp in Once Upon a Time in Mexico. Courtesy Columbia Pictures

Johnny Depp in The Rum Diary.

A teen pin-up in his 20s (which he hated) thanks to the lead role in the TV cop series 21 Jump Street. Courtesy 20th Century Fox Television

Johnny Depp in Sweeney Todd. Courtesy Dreamworks

Johnny Depp is the voice of Jack Kahuna Laguna in SpongeBob Square Pants. Courtesy United Plankton Pictures

Johnny Depp in Secret Window. Grand Slam Productions

Johnny Depp in Don Juan Demarco. Courtesy New Line

Johnny Depp in Nick of Time. Courtesy: Paramount

Johnny Depp in nightmare on Elm Street.

Depp played the title role in Tim Burton's Edward Scissorhands.

Johnny Depp in Blow.

Johnny Depp in Donnis Brasco.

Johnny Depp in The Brave

Depp starred in What's Eating Gilbert Grape in 1993.

Pirates of the Caribbean.

Johnny Depp in Ed Wood.