Discover Sydney Sweeney's measurements: Key details about her physique
Sydney Sweeney's measurements changed significantly after she took on the role of legendary boxer Christy Martin in her upcoming biopic. In a June 2025 interview with W Magazine, the actress narrated how she gained over 30 lbs in about three and a half months, saying:
I weight-trained for an hour in the morning, kickboxed for about two hours in the afternoon, and weight-trained for another hour at night.
Source: UGC
TABLE OF CONTENTS
Key takeaways
- Sydney gained notoriety in 2018 for her appearances in Sharp Objects and The Handmaid's Tale.
- She moved from a size 23 jeans to a size 27 during the weight training period.
- After the filming of the biopic had ended, Sweeney had to lose weight in only seven weeks for her next project.
- She struggled with body dysmorphia in high school.
Sydney Sweeney's profile summary
| Full name | Sydney Bernice Sweeney |
| Date of birth | 12 September 1997 |
| Age | 27 years old (As of July 2025) |
| Birthplace | Spokane, Washington, USA |
| Nationality | American |
| Ethnicity | White |
| Alma mater | Brighton Hall School |
| Sexual orientation | Straight |
| Marital status | Single |
| Parents | Lisa and Steven Sweeney |
| Siblings | Trent Sweeney |
| Profession | Actress |
| Years active | 2009-present |
| Net worth | $40 million |
| Social media | InstagramX (Twitter) |
Sydney Sweeney flaunted her major body transformation in October 2024
After months of various theories swirling around regarding Sydney's sudden weight gain, she addressed the issue in an Instagram post that read:
The cat is finally out of the bag! I have been training to bring to life the story of Christy Martin, who fought battles on and off the ring. I am honoured to reprise the role of a resilient and courageous woman.
Sweeney flexed her newly acquired bicep, with fans and celebs commenting on the photo. Australian actress Teagan Croft wrote:
Sydney, I am gagged!
Singer-songwriter Ellie Goulding added:
Go girl!
Source: Original
She described her body as being "completely different"
While speaking with W Magazine, Sweeney shared how her physique changed after months of intense physical training, revealing:
None of my clothes fitted me because my body had become so huge.
On the flip side, Sydney added:
I became the strongest I had ever been in my entire life!
In the interview, David Michôd, the director and co-writer of Martin's biopic, revealed how Sydney Sweeney positively embraced the changes in her body, stating:
Although Sydney worked so hard and had to gain over 14 pounds, she still showed up on set every day with her tail wagging, ready for the action. She was like a ray of sunshine.
Christy Martin commented on Sydney Sweeney's physique
Martin is a former professional boxer who suffered years of physical and emotional abuse by her late ex-husband, James Martin. In 2010, she survived a near-fatal incident where she was stabbed and shot.
Source: Getty Images
James was sentenced to 25 years in prison in 2012, but passed away in 2024 while serving his sentence. In an interview with TMZ in May 2024, Christy praised Sweeney's acting prowess, saying:
Sydney is young, hot, and talented. She is making a movie that dads will use to educate their daughters on domestic violence in 20+ years.
Sydney Sweeney shed significant weight after filming
After the Christy biopic wrapped, Sydney had to drop the weight to reprise the role of hyper-sexualised character Cassie Howard in the third season of Euphoria. Even David Michôd told W Magazine he was shocked by her new look.
I was stunned by the change in her appearance. She looks so different.
She considered plastic surgery while in high school
Although Sydney appears confident with her body, this has not always been the case. During a December 2023 interview with Glamour UK, the actress narrated how she used to cover herself up in high school as she felt her breasts were too big.
I planned to get a reduction surgery when I turned 18 because they made me so uncomfortable.
Source: UGC
But somehow, Sweeney's mom talked her out of it.
She told me I would regret my decision in college. I am glad I did not get the surgery because they are now my best friends.
FAQs
Sydney made her career debut as a guest star in Grey's Anatomy and Criminal Minds. Below are some frequently asked questions about her:
How intelligent is Sydney Sweeney?
Sweeney was a member of her high school's robotics team and the valedictorian of Brighton Hall School's graduating class.
How tall is Sydney Sweeney?
According to Sydney's IMDb profile, her height is 5' 3½" (161 cm). However, she has not publicly disclosed her weight and body measurements.
Is Sydney Sweeney an inverted triangle?
Sweeney's body is often described as an inverted triangle because of her full bust and narrower hips and waist. She has previously expressed frustrations with working with designers who did not understand her body shape.
Source: UGC
Is Sydney Sweeney married?
Entrepreneur Jonathan Davino and Sydney began dating in 2018 and became engaged about four years later. However, they separated in 2025 and called off their wedding.
In conclusion
Since 2024, Sydney Sweeney's body measurements have fluctuated as she has no problem gaining or losing weight for her acting roles. The actress added over 30 lbs in preparation for her appearance in Christy Martin's biopic, but she shed the weight for her next project, Euphoria.
READ MORE: Who are Sydney Sweeney's parents, Lisa Née Mudd and Steven Sweeney?
Briefly.co.za details about Sydney Sweeney's parents. Lisa is a former criminal defence lawyer, while Steven is a hospitality professional. The duo divorced amid their daughter's rise to fame.
Although Steven and Lisa were initially reluctant about Sydney pursuing an acting career, she convinced them with her five-year business plan. The actress moved to Los Angeles at 13 and briefly worked at Universal Studios Hollywood in 2016.
Proofreading by Kelly Lippke, copy editor at Briefly.co.za.
Source: Briefly News
