Kate Moss testifies that Johnny Depp never pushed her down the stairs in last-minute rebuttal against Amber Heard

• Kate Moss testified that Johnny Depp never pushed her down a flight of stairs.
• Amber Heard, earlier in the trial, said she thought of Moss as she punched Depp by a staircase.

Kate Moss took the stand in Johnny Depp's trial against Amber Heard on Wednesday, denying that Depp ever pushed her down a flight of stairs and saying that he tended to her after she slipped.

"I screamed because I didn't know what had happened to me, and I was in pain," she said. "And he came running back to help me and carried me to my room and got me medical attention."

Moss said she slipped when she and Depp were at a resort in Jamaica while they were dating, sometime between 1994 and 1998.

"We were leaving the room, and Johnny left the room before I did," she said. "And there had been a rainstorm. And as I left the room, I slid down the stairs and I hurt my back."

The model's entire testimony, via live video stream from Gloucestershire, England, took less than two minutes.

Moss' surprise role in the trial was teased Monday, as a person close to Depp told Insider she would be called as a witness.

While Moss wasn't on the original list of witnesses Depp's lawyers submitted to the court, they reserved the right to call "any witnesses identified" by Heard and "any witness necessary for rebuttal or impeachment."

Heard mentioned Moss in her testimony earlier in the trial, giving Depp's lawyers a legal basis to call Moss to the stand. Heard said that during a fight with Depp atop a flight of stairs, Moss flashed through her mind and she threw a punch at Depp in self-defense.

"I don't hesitate. I don't wait. I instantly think of Kate Moss and the stairs, and I swung at him," Heard said.

Heard appeared to be referring to a rumor that Depp once pushed Moss down the stairs. Moss has never publicly accused Depp of misconduct, and people close to Depp previously told Insider that the anecdote was false.

Moss, in her brief testimony Wednesday morning, said Depp never pushed her down a flight of stairs.

"He never pushed me, kicked me, or threw me down any stairs," Moss said.

The trial is over a lawsuit Depp brought against Heard alleging that she defamed him by describing herself as a victim of domestic violence in a 2018 Washington Post op-ed. Though Heard didn't name Depp in the article, Depp alleges it was clear to any reasonable reader that it was a reference to their relationship, which ended in 2016.

Other former partners of Depp, including Vanessa Paradis and Winona Ryder, have publicly supported him. But Ellen Barkin, who dated Depp in 1994, testified in a deposition on Heard's behalf, which was played for jurors at the trial, that Depp had a "jealous" and "controlling" streak and once threw a wine bottle in her direction.

Heard has denied Depp's claims and described about a dozen instances of physical violence, which she says often occurred when Depp was under the influence of drugs and alcohol.

She also presented a counterclaim against Depp. Moss' testimony is part of a rebuttal against that counterclaim.

The trial is scheduled to wrap up on Friday with closing arguments before the jury begins deliberating.