The Short Answer: Engaged, Not Married
Tanner Buchanan is not married — but he’s engaged. The 27-year-old actor proposed to Mary Mouser, his Cobra Kai co-star and girlfriend of several years, and she said yes. The engagement — announced with sweet photos — made them one of young Hollywood’s most beloved couples: the on-screen romance that became a real-life love story.
No wedding date has been publicly announced — the couple is enjoying the engagement — but fans are already treating the eventual ceremony as a Cobra Kai series finale of its own: the fandom’s favorite couple, making it official.
Who Is Mary Mouser?
Mary Mouser — Buchanan’s fiancée — plays Samantha LaRusso on Cobra Kai, the karate-kid heroine caught between dojos (and suitors). A former child actress (Body of Proof, voice work, commercials), she grew up in the industry alongside Buchanan — which may be why their partnership works: two lifers who speak the same language.
Off screen, Mouser is known for her warmth with fans, her advocacy (she’s spoken openly about living with Type 1 diabetes), and her easy chemistry with Buchanan — the kind that reads as genuine because it is.
How They Met: On the Mats
Buchanan and Mouser met as co-stars on Cobra Kai — he the troubled Robby Keene, she the principled Sam LaRusso. Their characters’ will-they-won’t-they romance mirrored — or maybe manifested — the real thing: by the show’s later seasons, the cast’s worst-kept secret was that Robby and Sam were together off camera too.
They confirmed the relationship publicly with red-carpet appearances and Instagram posts — low-key by Hollywood standards, sweet by any standard. The Cobra Kai cast — a famously tight ensemble — embraced it: on-screen family, off-screen too.
The worst-kept secret on the Cobra Kai set — Robby and Sam, together in real life — was an open secret for seasons before the confirmation: the cast’s knowing smiles, the joint appearances, the Instagram soft-launches. When they finally went public, the fandom’s reaction was pure joy: the on-screen romance was real.
The ensemble’s embrace — the famously tight Cobra Kai cast rallying around the couple — made it sweeter: on-screen family, off-screen too. Co-stars’ congratulatory comments on the engagement post read like family group-chat energy.
The Proposal
Buchanan’s proposal was romantic without being performative: an intimate moment, a ring, and a fiancée who said yes. The announcement photos — the couple glowing, the ring visible — broke the Cobra Kai fandom’s collective heart in the best way.
Co-stars flooded the comments with congratulations; fans made edits; the internet briefly became a wholesome place. For a generation raised on the show, Robby and Sam getting engaged felt like a series finale and a season premiere at once.
His Career: Beyond the Dojo
Buchanan’s breakout was Robby Keene — the troubled teen at Cobra Kai’s emotional center — but his résumé runs deeper: Designated Survivor (as the president’s son), He’s All That (the gender-swapped She’s All That remake), and a string of TV roles stretching back to childhood.
Like Mouser, he’s a lifer — acting since he was a kid, with the professionalism to prove it. Post-Cobra Kai, both he and Mouser are navigating the child-star-to-adult transition together: the rare Hollywood couple building careers and a marriage simultaneously.
Buchanan’s child-actor roots — the commercials, the guest spots, the slow build — gave him the professionalism that Cobra Kai demanded: Robby Keene’s arc, from troubled teen to tournament fighter, required six seasons of growth, and Buchanan delivered it.
Post-Cobra Kai, both he and Mouser face the transition — the child-star-to-adult leap — together: the rare Hollywood couple building careers and a marriage simultaneously. The engagement, in this light, is a statement: whatever comes next, they’re facing it as a team.
Wedding Plans: What’s Next
No wedding date’s been announced — and the couple seems in no rush. The engagement era is for enjoying: the congratulations, the planning, the slow build to the big day. Given their low-key style, expect an intimate, personal ceremony rather than a Hollywood production — though the Cobra Kai cast attendance is presumably non-negotiable.
Whatever they plan, the fandom will be watching: Robby and Sam’s wedding is the series finale the show never gave us — and this time, it’s real.
The engagement era — the congratulations, the planning, the fandom’s collective joy — is the couple’s victory lap: the on-screen romance made real, the Cobra Kai family rallying around its own. Whatever the ceremony brings — intimate, personal, the whole cast in attendance — it’ll be the rare Hollywood wedding the internet unites behind: Robby and Sam, forever, for real this time.
The lifers’ advantage — two child actors, grown up together, speaking the industry’s language — is the marriage’s foundation: no translating required, no fame shock. The dojo kids, all grown up — and just getting started.
Robby and Sam: The On-Screen Love Story
Robby Keene and Sam LaRusso — the troubled boy and the principled girl, the dojos’ Romeo and Juliet — were Cobra Kai’s central romance: six seasons of will-they-won’t-they, tournament drama, and genuine chemistry. That the actors fell in love playing it feels like the show’s final gift to its fans.
The engagement — announced with glowing photos — broke the fandom in the best way: the edits, the congratulations, the collective feeling that the series got its happy ending after all. Robby and Sam’s wedding will be the finale the show never filmed — and this time, it’s real.
Whatever the ceremony looks like — intimate, personal, presumably with the whole Cobra Kai cast in attendance — it’ll be the rare Hollywood wedding the internet is genuinely happy about. The dojos taught them to fight; each other taught them everything else.
The Cobra Kai Finale
Cobra Kai — the Karate Kid sequel that became a generational phenomenon — gave Buchanan and Mouser six seasons of slow-burn romance: Robby and Sam, the dojos’ star-crossed lovers, fighting their way to each other through tournaments and betrayals. That the actors fell in love playing it is the show’s final, unscripted gift.
The series finale — the tournaments concluded, the rivalries resolved — closed the book on the characters; the engagement opened the book on the actors. Fans got both endings: the fictional happy-ever-after and the real one.
Whatever the wedding looks like — intimate, personal, the whole cast presumably in attendance — it’ll be the rare Hollywood ceremony the internet is genuinely happy about: no cynicism, no discourse, just joy. The dojos taught them to fight; the show taught them to love; each other taught them the rest. Wax on, ever after.
Frequently Asked Questions
Is Tanner Buchanan married?
Not yet — Tanner Buchanan is engaged to Mary Mouser, but they haven’t married.
Who is Tanner Buchanan’s fiancée?
Mary Mouser — his Cobra Kai co-star, who plays Samantha LaRusso to his Robby Keene.
How did Tanner Buchanan meet Mary Mouser?
As co-stars on Cobra Kai; their on-screen romance became a real-life relationship.
When are Tanner Buchanan and Mary Mouser getting married?
No wedding date has been publicly announced — they’re currently enjoying the engagement.
How old is Tanner Buchanan?
He is 27 years old — acting since childhood.
What is Tanner Buchanan famous for?
Playing Robby Keene on Cobra Kai, plus Designated Survivor and He’s All That.
Does Mary Mouser have diabetes?
Yes — she’s spoken openly about living with Type 1 diabetes.
Are the Cobra Kai cast still friends?
Yes — famously tight; co-stars flooded the engagement announcement with congratulations.