Sydney Sweeney reportedly gained about 30 pounds for her portrayal of Christy Martin in the biopic Christy. Several outlets cited a roughly 30-pound weight increase to reach a fighter’s playing weight, with follow-up discussions noting the challenge of shedding that weight afterward. For reference, coverage around this transformation appeared in outlets such as Yahoo Entertainment and E! News in late 2025.[1][5]
Notes:
- Figures vary slightly in different reports, with some articles mentioning 30 pounds and others noting statements about “up to 35 pounds” depending on phrasing and timing of interviews. The most consistently reported figure across mainstream coverage is about 30 pounds gained for the Christy role.[3][5][1]
- If you’d like, I can pull together a quick side-by-side summary of the different weight figures reported and the corresponding interview sources.
Sources
Sydney Sweeney recently opened up about her weight gain and loss process, to play the role of Christy Martin in her 2025 sports drama Christy.
www.mandatory.comSydney Sweeney's diet was paired with hours in the gym, where she worked to build a fighter's physique.
www.ndtv.comSydney Sweeney provided a closer look at the fast food diet she adopted while trying to gain 30 pounds to portray boxer Christy Martin in her new movie, Christy.
www.eonline.comSydney Sweeney has revealed how she 'transformed her body' by gaining 35lbs for her role in Christy. In order to portray boxing legend Christy Martin for the biopic, the actor said she underwent a gruelling training process which involved early morning weight sessions, several hours of boxing, followed by more lifting sessions every day for three months. 'My days turned into 18 and 19 hour long days everyday.' 'I was constantly trying to transform my body. I put on 35lbs for Christy', she...
www.independent.co.ukIMDb, the world's most popular and authoritative source for movie, TV and celebrity content.
www.imdb.comSydney Sweeney recently opened up about her weight gain and loss process, to play the role of Christy Martin in her 2025 sports drama Christy.
www.realitytea.comSydney Sweeney reveals to PEOPLE how she lost the 30 lbs. she had gained for Christy before filming 'The Housemaid' and the third season of 'Euphoria'.
people.com