The Unofficial Timeline: 5 Reasons Why Fans Believe McKenna Grace And Mason Thames Are Hollywood’s New Power Couple

The romance speculation surrounding Hollywood's two most promising young stars, McKenna Grace and Mason Thames, has reached a fever pitch. As of late 2025, the pair—who are set to play passionate love interests in the highly anticipated *Regretting You* movie—have been fueling dating rumors with a series of public appearances, social media posts, and undeniable off-screen chemistry. Their connection, initially sparked by their roles as Clara Grant and Miller Adams, has captivated fans and led many to believe this on-screen pairing has blossomed into a real-life relationship, despite a lack of official confirmation from either star.

This deep dive explores the complete timeline of their rumored romance, from their initial casting in the Colleen Hoover adaptation to the most recent public sightings, while also detailing the impressive, parallel careers that have established both McKenna Grace and Mason Thames as generational talents. The evidence is mounting, and fans are eager to see if this young, talented duo will officially become Hollywood’s next power couple.

McKenna Grace and Mason Thames: Dual Biographies and Career Highlights

The foundation of this rumored romance is a shared experience as two of the busiest young actors in the industry. Both McKenna Grace and Mason Thames have built formidable résumés, moving seamlessly between major film franchises and critically acclaimed independent projects. Their professional profiles illustrate why their pairing would be a true Hollywood power match.

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McKenna Grace: Biography and Filmography

• Full Name: Mckenna Grace
• Date of Birth: June 25, 2006
• Age (as of Dec 2025): 19
• Birthplace: Grapevine, Texas, USA
• Career Start: Began acting professionally at age five.
• Breakthrough Role: Mary Adler in the 2017 film *Gifted*, opposite Chris Evans.
• Major Filmography Highlights: *I, Tonya* (as young Tonya Harding), *Captain Marvel* (as young Carol Danvers), *Ghostbusters: Afterlife* and *Ghostbusters: Frozen Empire* (as Phoebe Spengler), and the lead role in the horror film *The Bad Seed*.
• Television Roles: Recurring roles in *The Young and the Restless*, *Once Upon a Time*, and an Emmy-nominated performance as Esther Keyes in *The Handmaid's Tale*.
• Other Ventures: Also a talented singer and songwriter.

Mason Thames: Biography and Filmography

• Full Name: Mason Thames
• Date of Birth: July 10, 2007
• Age (as of Dec 2025): 18
• Birthplace: Dallas, Texas, USA
• Career Start: Early career included roles in ballet and appearing in the 2019 series *For All Mankind*.
• Breakthrough Role: Finney Blake in the 2021 supernatural horror film *The Black Phone*, alongside Ethan Hawke.
• Major Filmography Highlights: Reprising his role in *The Black Phone 2* (expected 2025), and landing the coveted lead role of Hiccup in the live-action adaptation of *How to Train Your Dragon* (expected 2025).
• Upcoming Projects: Beyond *Regretting You*, he is also attached to the film *New Year's Rev*.

The Regretting You Connection: How Clara and Miller Sparked the Rumors

The entire narrative of McKenna Grace and Mason Thames’s rumored romance is inextricably linked to their work on the film adaptation of Colleen Hoover’s novel, *Regretting You*. The film, which follows the complex relationship between a mother (Morgan Grant, played by Allison Williams) and her daughter (Clara Grant, played by McKenna Grace), features a pivotal love story between Clara and her high school sweetheart, Miller Adams (played by Mason Thames).

The casting announcement in late 2024 immediately generated buzz, given the book’s massive fanbase and the intensity of the characters' relationship. The on-screen chemistry required for the roles of Clara and Miller was apparently effortless for the two young actors, and their rapport quickly spilled over into their off-screen interactions.

The cast, which also includes stars like Dave Franco, spent significant time together during filming, leading to a visible closeness between Grace and Thames. This professional bond quickly evolved into a close friendship, which fans observed and began to interpret as something more.

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5 Key Moments Fueling the Dating Speculation Timeline

While neither McKenna Grace nor Mason Thames has released a formal statement confirming a relationship, a series of high-profile and viral moments over the past year have convinced the public they are a couple. These are the five most significant events in the rumored timeline:

1. The Viral TikTok Kiss (April 2025): The rumors exploded in April 2025 when the co-stars participated in a popular TikTok trend. The video, which quickly went viral, featured them lip-syncing to audio from the movie *500 Days of Summer* and ended with Mason Thames grabbing McKenna Grace and sharing a kiss. This single post was the most significant catalyst for the real-life dating rumors.
2. The "Clicked Immediately" Interviews: In interviews promoting *Regretting You*, both actors spoke highly of each other, often using terms that suggested a deep and immediate connection. Sources close to the production noted that Grace and Thames "clicked immediately" and had a natural, flirty dynamic that made their on-screen romance believable.
3. Joint Public Appearances and Praise: Following the TikTok, the pair began appearing together frequently at red carpet events, screenings, and casual public outings. They consistently "sang each other's praises" in interviews, with Mason Thames reportedly describing McKenna Grace as a "super talented" and "amazing" co-star.
4. The Hand-Holding Sighting (June 2025): A major development occurred in June 2025 when the two were photographed walking around New York City while holding hands. This public display of affection, though not a verbal confirmation, was widely considered by fans and media outlets to be the strongest evidence yet of a romantic relationship.
5. The Continued Social Media Flirtation: Even after the initial buzz, their social media activity has maintained a high level of interaction. Frequent likes, comments, and shared posts on platforms like Instagram and TikTok have kept the speculation alive, with their playful banter often delighting their respective fan bases.

Why the Silence? Navigating Young Stardom and Public Scrutiny

Despite the overwhelming evidence and fan desire for confirmation, the silence from both McKenna Grace and Mason Thames is entirely understandable. Both actors are navigating the intense public scrutiny that comes with being an 18 and 19-year-old in the spotlight, especially while promoting major film projects.

For young stars, keeping personal life private is often a strategic choice. An official confirmation could overshadow their professional work, particularly the release of *Regretting You*, *The Black Phone 2*, and *How to Train Your Dragon*. Their focus remains on their careers, which are currently on a simultaneous upward trajectory in Hollywood.

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The entertainment industry often encourages "showmances" or leaves relationship status ambiguous to generate buzz, but in this case, the chemistry appears genuine. The decision to manage their public image while experiencing a real-life connection is a common challenge for young celebrities.

The reality is that whether they are officially "dating" or just sharing an incredibly close, deep, and flirty friendship, the dynamic between McKenna Grace and Mason Thames is undeniable. Their shared experience as rising talents, coupled with the emotional intensity of their roles in *Regretting You*, has created a bond that resonates deeply with their fans. Until a formal announcement is made, the public will continue to follow every red carpet appearance and social media post, confident that Hollywood has found its newest, most adorable young couple.