Sydney Sweeney gains 13.61kg for role in 'Christy'

Entertainment Nov 12, 2025

Sydney Sweeney, best known from Euphoria, is taking on the role of boxing legend Christy Martin in the upcoming film Christy.
To get into character, she put on 13.61kg by eating lots of fast food and committed to a tough workout routine.
The movie, directed by David Michod, tells Martin's story—her rise in a male-dominated sport and her survival after a violent attack by her then-husband.

The actor's intense training and diet

Sweeney spent three and a half months training hard: early morning weightlifting, hours of kickboxing every afternoon, plus extra evening workouts.
She also changed up her diet to pack in more calories.
While the physical transformation brought some wardrobe challenges, Sweeney shared that she feels stronger because of it.