Marianne von Gierke, a Chilean professional bodybuilder and lawyer, has died at the age of 40, less than three weeks after finishing 13th in the Women’s Physique division at the 2026 Mr. Olympia in Las Vegas. NPC Worldwide Chile announced her death on Wednesday, October 14.
No cause of death has been made public. The news has drawn tributes across the bodybuilding community, in part because she was active on social media shortly before it was announced and had just completed one of the strongest seasons of her career.
Marianne von Gierke Death: What Happened
According to Generation Iron, the news was shared in a joint social media statement from NPC Worldwide Chile and fellow Chilean bodybuilder Felipe Isaac Fierro. RXMuscle also published a tribute. NPC Worldwide Chile described her as an athlete who left a lasting mark on the sport through her discipline and commitment.
Her last social media post, reportedly made only hours before the announcement, congratulated a friend on a physique transformation. In an earlier post, she thanked her partner of about 10 years, Juan Cofré García, for standing by her through a demanding season. “He is with me 365 days a year,” she wrote, according to reports.
It is not stated in the reports reviewed where she was when she died, or in what circumstances.
Her Final Season: Key Facts
Von Gierke’s recent results show an athlete who was still moving up in the sport. The verified details so far:
- Age: 40, originally from Chile’s Magallanes region.
- Professional status: earned in 2021 after several years of amateur competition.
- 2024 Mr. Olympia: placed 16th in the Women’s Physique category.
- August 2026: won a Rising Phoenix title, which earned her another place at Mr. Olympia. Reports differ on the exact name of the title.
- 2026 Mr. Olympia: finished 13th in late September, three places higher than in 2024.
- Outside the sport: a lawyer, a fitness trainer and the mother of an 11-year-old son.
What We Do Not Know Yet
The cause of death has not been disclosed. Neither the reports reviewed nor the NPC Worldwide Chile tribute explain it, and no statement from her family has been quoted.
That gap matters. When a young, visibly fit athlete dies suddenly, speculation about training, diet or supplements tends to spread within hours. None of it is verified, and it can hurt a grieving family. Until relatives or authorities confirm a cause, the only accurate statement is that it is unknown.
Background: Mr. Olympia and the Women’s Physique Division
Mr. Olympia is the sport’s premier professional event, held in Las Vegas, and competitors must earn a place through results at the pro level. Von Gierke’s August win was the route back to the stage in 2026. Qualifying once is difficult; returning a second time and improving her placing shows consistency over two seasons.
Women’s Physique is judged mainly on muscle development, symmetry and conditioning. It sits between the more aesthetic figure divisions and the heavier-muscled Women’s Bodybuilding class. Preparing for it usually means months of structured training and dieting, which is why her partner described the work behind the scenes as shared by two people.
What Comes Next
- Cause of death: not yet known. Any confirmation would most likely come from her family or the relevant authorities.
- Memorial arrangements: none have been announced in the reports reviewed.
- Further tributes: more statements are likely from NPC Worldwide Chile and from fellow athletes.
What Readers Should Keep in Mind
If you follow the sport or train hard yourself, a few practical points apply. They are general advice and are not linked to any finding about this case.
- Rely on statements from her family, NPC Worldwide Chile or official bodies, not on unverified social media claims.
- Do not share rumours about the cause of death.
- If you train intensively or compete, have regular medical check-ups.
- Chest pain, fainting, a racing heartbeat or unusual breathlessness during exercise are reasons to see a doctor promptly.
The Bigger Picture
Marianne von Gierke built a career across several demanding roles at once: lawyer, trainer, mother and elite competitor. Her last public messages were about gratitude and about celebrating other people’s progress. Her death at 40 will likely prompt wider conversations about athlete health in physique sports, but those conversations need facts to be useful. For now, the clearest thing to say is that a respected competitor has died and that her cause of death has not been shared.
This is a developing story and will be updated.
Sources
- NPC Worldwide Chile and Felipe Isaac Fierro statement, as reported by Generation Iron
- New York Post report on the 2026 Mr. Olympia result
- RXMuscle tribute
