The Truth About Mason Thames's Girlfriend: 5 Shocking Updates On His Mckenna Grace Romance (2025)
The question of "Who is Mason Thames's girlfriend?" has dominated fan curiosity across social media throughout 2025, and the answer points overwhelmingly to one person: his co-star, Mckenna Grace. As of December 2025, the rising star of *The Black Phone* and the live-action *How to Train Your Dragon* remake has not officially confirmed a romantic relationship, but the constant public appearances, social media posts, and undeniable on-screen chemistry with Grace have fueled an intense wave of speculation that they are, in fact, Hollywood's newest power couple. The rumors reached a fever pitch following the release of their highly anticipated film, *Regretting You*.
The intense spotlight on Mason Thames's personal life is a direct result of his meteoric rise in the film industry, transitioning from a horror sensation to a fantasy lead in a single year. While the 18-year-old actor remains focused on his career, his relationship with Mckenna Grace is the hottest topic in celebrity gossip, with multiple sources suggesting the two are inseparable. This deep dive explores the current status of their rumored romance and provides a complete profile of the young actor.
Mason Thames: Full Biography and Career Profile
Mason Thames is an American actor who has quickly become one of the most sought-after young talents in Hollywood, known for his compelling performances in both horror and fantasy genres. Before his film career took off, Thames trained as a ballet dancer, a discipline that gave him a unique foundation in movement and performance.
- Full Name: Mason Thames
- Date of Birth: July 10, 2007
- Age (as of Dec 2025): 18 years old
- Birthplace: Dallas, Texas, USA
- Sister: Brooke-Madison
- Breakthrough Role: Finney Blake in *The Black Phone* (2021)
- Major 2025 Roles: Hiccup in the live-action *How to Train Your Dragon*, and the romantic lead in *Regretting You*
- Early Career: Appeared as a young Danny Stevens in the Apple TV+ series *For All Mankind*.
His portrayal of the terrified yet resilient Finney Blake in the 2021 horror hit *The Black Phone* launched him into the mainstream. He reprised this role in the sequel, *The Black Phone 2*, released in late 2025. However, it is his casting as the iconic Hiccup in the live-action adaptation of *How to Train Your Dragon* that cemented his status as a major leading man, a project that has been a childhood dream come true for the actor.
The Mckenna Grace Rumors: Is She Mason Thames's Girlfriend?
The persistent rumors linking Mason Thames and actress Mckenna Grace are not just idle fan speculation; they are rooted in a series of collaborative projects and highly public interactions. The speculation began in earnest when the two were cast as high school lovebirds in the film adaptation of Colleen Hoover's novel, *Regretting You*.
1. The "Regretting You" Chemistry
The primary source of the dating rumors is their intense on-screen chemistry in *Regretting You*, which was palpable even in the promotional trailers. Playing a couple often leads to "shipping" among fans, but in this case, the actors’ off-screen friendship seemed to mirror the romantic dynamic of their characters. Their joint appearances at photocalls and premieres for the film in October 2025 showed a level of closeness and comfort that suggested more than just a professional relationship.
2. The "Favorite Person" Confirmation
While neither Mason nor Mckenna has explicitly used the term "dating" or "girlfriend," Mckenna Grace offered a significant clue about their bond. During an interview about their work together, she referred to Mason Thames as her "favorite person." This is a strong, personal endorsement that fans and media outlets have interpreted as a soft confirmation of a romantic involvement, or at the very least, a deeply affectionate connection.
3. Social Media Clues and TikToks
The relationship timeline has been heavily documented through their social media activity. In April 2025, Grace shared a TikTok clip of herself and Thames lip-syncing to a well-known audio from the movie *500 Days of Summer*, a film famous for its exploration of modern romance and heartbreak. These playful, intimate posts on platforms like TikTok and Instagram have kept the rumor mill churning, as they consistently choose to share moments of their personal time together, not just promotional content.
Why Mason Thames’s Relationship Status Remains a "Mystery"
Despite the overwhelming evidence and fan desire for confirmation, Mason Thames's official relationship status remains technically unconfirmed by the actor himself. This is a common practice for young, rising stars who wish to maintain a degree of privacy, especially when their career is rapidly accelerating with major projects like *How to Train Your Dragon*.
The fact is, Mason Thames is currently one of the busiest young actors in Hollywood. His focus has been on the demanding schedules for *The Black Phone 2* and the epic scale of the *How to Train Your Dragon* live-action film, where he stars as Hiccup alongside Nico Parker as Astrid. For a young star, prioritizing career momentum often means keeping personal life details private to ensure the focus remains on the professional work.
Ultimately, while Mason Thames has not publicly declared Mckenna Grace as his official girlfriend, the evidence from their co-starring roles, public gushing, and frequent appearances together strongly suggests a very deep, possibly romantic, connection. For now, fans are left to enjoy their incredible on-screen and off-screen chemistry and wait for any further official announcements from the young stars.
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