For the actress behind Samantha LaRusso, the spotlight of Cobra Kai revealed more than just fight choreography — it put her long-running management of type 1 diabetes and a surprise engagement into the public conversation. Here’s what’s confirmed about Mary Mouser beyond the dojo.
Known for: Samantha LaRusso on Cobra Kai · Diagnosed with: Type 1 diabetes at age 13 · Relationship status: Engaged to Tanner Buchanan (2025)
Quick snapshot
- Full name: Mary Matilyn Mouser (ABC News)
- Diagnosed with type 1 diabetes at age 13 (Healthline)
- Plays Samantha LaRusso on Cobra Kai (Tandem Diabetes Care)
- Instagram: @missmarymmouser (Instagram)
- Engaged to Tanner Buchanan (announced February 2025) (ABC News)
- Co-stars on Cobra Kai (Tandem Diabetes Care)
Four key facts sum up Mary Mouser’s public profile, each backed by direct sources.
Here is the key information about Mary Mouser in a structured format.
| Label | Value |
|---|---|
| Full name | Mary Matilyn Mouser |
| Known for | Samantha LaRusso in Cobra Kai |
| Marital status | Engaged to Tanner Buchanan (2025) |
| Diabetes diagnosis | Type 1 diabetes, diagnosed at age 13 |
| Insulin pump use | Tandem insulin pump, worn under karate gi |
Are Mary Mouser and Tanner Buchanan a couple?
Are Mary Mouser and Tanner Buchanan engaged?
- Engagement confirmed in February 2025 at the Cobra Kai series finale premiere in Hollywood (ABC News).
- Joint Instagram post caption: “We’re so happy to finally share that we’re engaged” (Instagram).
They have not publicly shared a wedding date.
Did Mary Mouser and Tanner Buchanan date before Cobra Kai?
There is no public evidence that the two were romantically involved before they co-starred on Cobra Kai. Their relationship appears to have developed on set in the years after the show began filming (Tandem Diabetes Care).
Why this matters: For fans who followed Samantha and Robby’s on‑screen arc, the real‑life engagement adds a layer of narrative closure — and signals that the cast’s bonds extend beyond the dojo.
What is Mary Mouser diagnosed with?
What condition does Mary Mouser have?
- Mary Mouser has type 1 diabetes (Healthline).
- She was diagnosed one month after her 13th birthday (Business Insider).
- Before diagnosis, she experienced headaches, thirst, and frequent urination (Healthline).
Why did Mary Mouser gain weight?
No official statement explains any weight changes. Speculation about her weight is not supported by confirmed medical sources. Mouser’s public comments focus on diabetes management, not weight fluctuation (Business Insider).
Mouser has turned a chronic condition into a platform. She uses a Tandem insulin pump with a continuous glucose monitor and checks levels via smartphone during filming — proving that type 1 diabetes doesn’t stop her from performing martial arts choreography (Tandem Diabetes Care
Daniel Harper is Editor-in-Chief at Aussie Report, overseeing editorial standards, publication decisions and corrections.