# Sydney Sweeney film about Christy Martin

> Live situation record from CLSTR: https://clstr.news/situations/sydney-sweeney-film-about-christy-martin
> Updated: 2026-09-02T12:53:03.000Z. Sources: 4. Developments: 2.

Actress Sydney Sweeney underwent a significant physical transformation, gaining 16 kilograms of muscle mass, to prepare for her role as professional boxer Christy Martin in the film ‘That’s Why the Lady Is A Champ’. To facilitate her training, Sweeney spent three months working with professionals and converted a garage in Idaho into a makeshift gym.

The film, which depicts Martin’s life as a pioneer for women’s boxing in the 1990s, has moved into cinema release. Beyond Martin’s athletic achievements, the production explores her history of domestic violence involving her trainer and husband, Jim Martin. The film’s patron, Collien Fernandes, has utilized the preview tour to address toxic relationships and the importance of violence prevention in schools.

## Timeline

### 2026-09-02: Sydney Sweeney stars in film about boxer Christy Martin

Sydney Sweeney stars in ‘That’s Why The Lady Is A Champ’, a film about professional boxer Christy Martin and her struggle with domestic violence and toxic relationships.

2 sources. https://clstr.news/cluster/sydney-sweeney-stars-in-film-about-boxer-christy-martin

### 2026-08-28: Sydney Sweeney gains 16kg for boxing film role

Actress Sydney Sweeney gained 16kg of muscle mass to portray boxer Christy Martin in the upcoming film ‘That’s Why the Lady Is A Champ’.

2 sources. https://clstr.news/cluster/sydney-sweeney-gains-16kg-for-boxing-film-role

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Cite as: Sydney Sweeney film about Christy Martin. CLSTR, https://clstr.news/situations/sydney-sweeney-film-about-christy-martin