The Shocking Truth: Is Mary Mouser Married? Inside Her Surprise Engagement To A Cobra Kai Co-Star
The question of "Is Mary Mouser married?" has a definitive and exciting new answer in late 2025. While the actress, globally recognized as Samantha LaRusso from the hit Netflix series Cobra Kai, does not currently have a "husband," she has recently confirmed a major, surprising step in her personal life that has fans buzzing. The long-standing speculation about her on-screen chemistry translating to real-life romance has finally been answered with a stunning engagement announcement to a fellow star from the Miyagi-Do and Cobra Kai universe.
The news is fresh, with the actress confirming her new relationship status in February 2025, revealing that she is officially off the market and preparing to walk down the aisle. This article dives deep into the identity of her fiancé, the end of her previous long-term relationship, and all the essential details about the woman behind the karate gi, Mary Matilyn Mouser.
Mary Mouser: Complete Biography and Profile
Mary Matilyn Mouser is an American actress who has successfully transitioned from a prolific child star to a leading lady on one of the most popular streaming shows of the decade. Her career spans over two decades, featuring significant roles in both film and television before her breakout success in the Karate Kid sequel series.
- Full Name: Mary Matilyn Mouser
- Date of Birth: May 9, 1996
- Age (as of late 2025): 29 years old
- Place of Birth: Pine Bluff, Arkansas, United States
- Nationality: American
- Parents: Tina Mouser (Mother) and Scott Mouser (Father)
- Siblings: Aaron Parker Mouser and Laura Ashley Mouser (both actors)
- Height: Approximately 5 feet 3 inches (160 cm)
- Most Famous Role: Samantha "Sam" LaRusso in Cobra Kai (2018–2025)
- Other Notable Roles: Lacey Fleming in Body of Proof, Karen Grant in Scandal, and the voice of Eloise in Eloise: The Animated Series.
- Net Worth: Estimated to be around $2 million (USD)
- Current Status: Engaged to Tanner Buchanan
The Fiancé Reveal: Who Is Mary Mouser Marrying?
The question of "Mary Mouser husband" can now be answered with the name of her soon-to-be husband: Tanner Buchanan. The news of the engagement between the two Cobra Kai co-stars sent shockwaves through the fandom, largely because their real-life romance had been kept largely under wraps for years, despite the intense on-screen drama between their characters.
Tanner Buchanan, who plays Robby Keene—the son of Johnny Lawrence and a key martial arts rival—is the actor who holds the title of Mary Mouser's fiancé. The pair's characters, Samantha LaRusso and Robby Keene, have a complex and often tumultuous relationship on the show, which only added to the surprise of their real-life coupling.
A Secret Romance Blossoms Into Engagement
Mary Mouser and Tanner Buchanan met on the set of Cobra Kai in 2017 when the series first began production. While their on-screen relationship was a rollercoaster of Miyagi-Do and Cobra Kai loyalties, their off-screen bond reportedly began as a close friendship that eventually blossomed into a secret romance.
The couple chose to keep their relationship intensely private, avoiding the public spotlight and social media posts that often accompany celebrity dating. This decision made their public announcement all the more impactful. The couple officially hard-launched their relationship and announced their engagement simultaneously in February 2025, coinciding with the premiere events for the final season of Cobra Kai.
They were photographed holding up matching engagement rings at a red carpet event, later confirming the news in a joint Instagram post where they expressed their happiness to finally share their relationship status with the world. This highly anticipated union of the two main stars is considered a fairytale ending for the cast, even as the series itself wraps up.
Mary Mouser’s Past Relationships and Dating History
Before her engagement to Tanner Buchanan, Mary Mouser was in a serious, long-term relationship that fans believed was heading toward marriage. Her dating history is an important part of the narrative, as it provides context for the secrecy surrounding her current relationship and the timeline of events.
The Long-Term Relationship with Brett Pierce
For several years, Mary Mouser's public partner was actor Brett Pierce. The two began dating in December 2015, well before Mouser landed her career-defining role as Samantha LaRusso. Their relationship was frequently documented on social media, with the couple sharing milestones and celebrating anniversaries, leading many fans to assume Pierce would be the one to become Mary Mouser's husband.
Brett Pierce is also an actor, known for roles in projects like The Ghost and the Whale. The couple met through mutual friends and were often seen as a stable, long-standing Hollywood pairing. However, reports of their breakup began to surface between 2021 and 2024, with various sources confirming the end of their relationship after nearly six years together. The exact circumstances of the split were kept private, allowing Mouser to focus on her career and, as it turns out, a budding new romance.
Beyond Cobra Kai: Mary Mouser’s Versatile Acting Career
While the role of Samantha LaRusso has made Mary Mouser a global martial arts icon, her career is marked by a history of versatile and challenging roles, proving her topical authority as an actress long before she stepped onto the All Valley Karate Tournament mat.
- The Early Years: Mouser began her career as a child actress, famously working as a photo double for Mel Gibson's daughter in the M. Night Shyamalan film Signs (2002). She also lent her voice to the animated character Eloise in Eloise: The Animated Series.
- The ABC Years: One of her most significant early roles was as Lacey Fleming, the daughter of medical examiner Dr. Megan Hunt (played by Dana Delany), in the ABC procedural drama Body of Proof (2011–2013). She appeared in all three seasons of the show, gaining recognition for her dramatic performances.
- The White House Drama: Mouser later joined the cast of the political thriller Scandal in Season 4, taking over the recurring role of Karen Grant, the daughter of President Fitz Grant and First Lady Mellie Grant. This role demonstrated her ability to handle complex network television dramas.
Her work in these diverse projects—from voice acting to crime drama to political thriller—demonstrates a strong foundation that prepared her for the physical and emotional demands of Cobra Kai. Her current status as an engaged woman marks a new, exciting chapter in her life, a personal victory that fans of Sam LaRusso and Robby Keene can celebrate equally.
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