Kate Moss is due to give evidence in Johnny Depp's defamation case against his former wife Amber Heard.
The British supermodel, who dated the Pirates of the Caribbean star in the 1990s, is expected to appear in court in the US by videolink on Wednesday.
She is being called by the actor's legal team, who were seen appearing to celebrate when her name was mentioned by Heard during her testimony last week.
The actress had described hearing a rumour that Depp had allegedly pushed the model down a flight of stairs, which may become the subject of questions put to Moss during her testimony.
The court has previously heard from another of Depp's former partners, Ellen Barkin, who alleged he had been controlling during their brief relationship.
Depp is suing Heard over a 2018 article she wrote in the Washington Post, which his lawyers say falsely implies he physically and sexually abused her while they were together.
He has denied all accusations.
Over recent weeks, jurors have heard details of multiple instances of alleged abuse, with accusations of violence levelled at both Depp and Heard.
Moss' testimony comes in the final week of the trial, taking place in Fairfax County, Virginia, with closing arguments expected on Friday.
Source: Press Association