Sydney Sweeney is getting into fight mode for her latest film, a biopic about professional boxer Christy Martin.

The Euphoria actor looked ready to rumble as she shared behind-the-scenes photos from the set of her project about the super welterweight champion on Instagram.

In the photos, taken by Eddy Chen, Sweeney has traded her blond hair for a curly, very 90s brunet cut and flexes her biceps as she wears baggy sweats and a red tank top.

Revealing how shes been getting ready for the yet-to-be-titled film, the stars caption said shes been immersed in training for several months.

In her post, the star of The White Lotus described Martin as an incredible woman and a true champion who fought battles both inside and outside the ring.