Mason Thames: Age, Relationship with McKenna Grace, and Career

Mason Thames went from Dallas teenager to horror breakout in a single film — and then his real-life romance with co-star McKenna Grace turned the gossip dial even higher. Here’s what’s actually known about Mason Thames, from his age and nationality to the timeline of his relationship with Grace.

Age: 17 (born July 10, 2007) ·
Nationality: American ·
Known for: Finney Blake in The Black Phone ·
Instagram followers: 3 million ·
Relationship status: In a relationship with McKenna Grace

Seven key facts about Mason Thames, verified from multiple sources.

Is Mason Thames in a relationship?

Are Mason and McKenna together?

• Yes, multiple reports confirm they are dating. Mason Thames and McKenna Grace made their relationship public in early 2025, with Famous Birthdays reporting an April 2025 public announcement (Famous Birthdays).
• They were photographed holding hands in New York City in June 2025, prompting IMDb News to refer to Grace as Thames’s “girlfriend” (IMDb News (film industry news)).
• As of October 2025, Yahoo Entertainment reported they are still together after the release of Regretting You (Yahoo Entertainment).

How did Mason and McKenna meet?

• They met on the set of the upcoming film Regretting You (Yahoo Entertainment).
• Mason Thames has described Grace as “one of the most ambitious people I have ever met” (Yahoo Entertainment).

The implication: For fans following Mason Thames’s personal life, the relationship is one of the few fully confirmed aspects outside his filmography.

What is the age gap between McKenna and Mason?

How old are Mason Thames and McKenna Grace?

• McKenna Grace was born June 25, 2006 (IMDb).
• Mason Thames was born July 10, 2007 (IMDb).
• Age difference: approximately 1 year and 15 days — McKenna is older by about 12 months (IMDb News).

That makes the age gap just over a year, with Grace roughly one year older. In June 2025, IMDb News reported Thames as 17 and Grace as 18 during their New York outing.

The pattern: When both actors are minors or just barely legal, every birthday and age update becomes tabloid fodder — but the actual numbers show a close-age pairing.

Why is Mason Thames so famous?

What is Mason Thames best known for?

• He is best known for his starring role as Finney Blake in the 2021 horror film The Black Phone (IMDb).
• The film grossed over $161 million worldwide and earned critical acclaim (Rotten Tomatoes (review aggregator)).
• Thames made his acting debut in 2017, but The Black Phone was his breakthrough (IMDb).

His performance as a kidnapped teen who communicates with a supernatural phone earned him comparisons to early-career River Phoenix and launched him into the spotlight.

What this means: Thames’s fame is built on one defining role, but he’s actively working to diversify his filmography before he gets typecast.

What nationality is Mason Thames?

Where was Mason Thames born?

• Mason Thames is an American actor, born and raised in Dallas, Texas (IMDb; Wikipedia).
• His nationality is confirmed as American (Wikipedia).

He has lived in the Dallas area his entire life, and Screen Dollars notes that his older sister is dancer Brooke-Madison (Screen Dollars).

The trade-off: Being from a non-Hollywood city may have slowed his early career, but it also gives him a grounded perspective common among young Texas actors.

How old is Mason Thames?

What is Mason Thames’s birth date?

• Born July 10, 2007 (IMDb).
• As of 2025, he is 17, turning 18 on July 10, 2025 (People).
• His zodiac sign is Cancer.

People reported in August 2025 that Thames celebrated his 18th birthday in Texas with McKenna Grace and family (People).

Why this matters: Age determines everything from legal contracts to public perception. Thames turning 18 in July 2025 marked a threshold for his career freedom.

Timeline of Mason Thames’s career and relationship

Five milestones in Mason Thames’s life and work, verified from multiple sources.

What’s confirmed and what’s still unclear

Confirmed facts

• Mason Thames was born on July 10, 2007.
• He is an American actor.
• He played Finney Blake in The Black Phone.
• He has 3 million Instagram followers.
• He is in a relationship with McKenna Grace.

What’s unclear

• Exact height (not publicly available).
• Parents’ identities (not widely reported).
• Net worth (not disclosed).
• Exact start date of relationship (rumored from 2023 or 2024).
• Future projects beyond IMDb listings.

In his own words and from the screen

“She’s one of the most ambitious people I have ever met.”

— Mason Thames on McKenna Grace, via Yahoo Entertainment

“Finn, played by Mason Thames, is 17 and struggling with life after captivity.”

— Black Phone 2 featurette (Universal Pictures, film’s distributor)

What’s next for Mason Thames

With Black Phone 2 arriving in October 2025 and a live-action How to Train Your Dragon on the horizon, Mason Thames is at a career inflection point. For the young actor, the choice is clear: continue selecting roles that stretch his range, or risk being defined forever by the eerie phone calls of Finney Blake.

Frequently asked questions

Related reading

• Malina Weissman: Ethnicity, Age, Violet Baudelaire Role
• Theo James: Biography, Family Career & Rumors Fact-Check