Amber Heard, 36, had claimed that she heard rumours that Mr Depp once pushed Ms Moss down a flight of stairs.

Mr Depp is suing Ms Heard for $50m (£40m) for an opinion article she wrote in which she said she was an abuse victim.

On the stand, he said that it has been "insane" to hear Ms Heard's claims.

Over the course of the six week trial, the court has heard vastly different versions of what transpired between the two during their volatile two year marriage.

Ms Heard and witnesses for her side painted a picture of Mr Depp as an abuser plagued by drug use, jealous and self-harm and Mr Depp's side putting forward a story of the actress as the aggressor and her claims as untrue.

In brief testimony on Wednesday, Ms Moss - who dated Mr Depp between 1994 and 1998 - said that he never pushed her, but rather that he once came to her aid after she fell down the stairs.

"As I left the room, I slid down the stairs and I hurt my back," Ms Moss said. "And I screamed because I didn't know what happened to me and I was in pain".

"He came running back to help me and carried me to my room and got me medical attention," she added.

Mr Depp never pushed or kicked her throughout the years they spent together, Ms Moss said.

Taking the stand on Wednesday, Mr Depp accused Ms Heard of turning the story "into a very ugly incident, all in her mind."

The claim he had pushed her was brought up earlier in the trial by Ms Heard, who said the image of her then-husband abusing the model had popped into her head when she witnessed an altercation between Mr Depp and her sister.

"[Her] back was to the staircase and Johnny swings at her," Ms Heard said. "I don't hesitate. I don't want. I just, in my head, think of Kate Moss and stairs".

Her concerns prompted her to "swing" at Johnny to defend her sister, she said, hitting him "square in the face".

Her lawyers chose to not cross-examine Ms Moss.

BBC News