Ellie Bamber worked with a trainer for her role as Kate Moss.

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It was the era of heroin chic. When iconic supermodel Kate Moss was at the height of her modeling career in the 1990s, she was often pictured at clubs with a cigarette, a far cry from today's trends of Pilates and matcha lattes.So when actor Ellie Bamber came to play Moss in the recently released movie "Moss & Freud," she had her work cut out. How to create Moss's supermodel physique without resorting to unhealthy methods?She worked with trainer Luke WorthingtonBamber, who has also starred in "Red, White & Royal Blue" and "William Tell," worked with film and TV personal trainer Luke Worthington to prepare to embody Moss, a process that ultimately took years due to various filming delays. Worthington and Bamber started working together in January 2022 and focused on film prep from December of that year, expecting to shoot in summer 2023. Filming was postponed until spring/summer 2024. They also had to contend with a fractured ankle, but they got Bamber ready to play Moss with a startling likeness."Ultimately, it wasn't going to be a perfect like-for-like, but we wanted to try to get as close to Kate as we could, but it was really important for both of us that I remained really healthy," Bamber told Business Insider. "One of the goals was also for me to feel good, because I'm nude quite a lot in the film and that's kind of daunting in itself, so I just wanted to feel really in tune with my body and really confident."In 2017, Kate Moss told The Guardian that she never used to eat salads or go to the gym. "Ellie was portraying somebody who perhaps wasn't overly health-conscious at that particular phase of their life, but compromising her health was never going to be something that we would consider," said Worthington.Here's how they made it happen.