Mason Thames ( ; born July 10, 2007) is an American actor. He made his acting debut in 2017 and gained recognition for his performance in the lead role of Finney Blake in the horror film The Black Phone (2021), a breakthrough role he reprised in its 2025 sequel. In 2025, he received increased attention for his portrayal of Hiccup in the live-action fantasy How to Train Your Dragonfor which he received a nomination for a Saturn Awardand for his romantic lead role in Regretting You.
Early life Thames was born on July 10, 2007, in Dallas, Texas. He was raised in McKinney and attended school in Prosper.
Career
Thames made his acting debut in the 2017 short film After Omelas as Liam. He was featured in three episodes of the first season of the Apple TV+ series For All Mankind in 2019. Thames played the lead role in Scott Derrickson's horror film The Black Phone (2021). The role garnered him widespread acclaim.
On casting Thames over hundreds of other applicants, Derrickson stated that "he has a gift that very few actors, even adult professional actors, have, which is the ability to truthfully and emotionally process every moment, one shot at a time, without overacting. It's in his eyes and in his countenance, and his ability to do that in an honest, real way is something you can't teach." He reprised his role in the sequel Black Phone 2. Thames also featured as a younger version of Cordell Walker in the first two seasons of Walker. He starred in the comedy film Incoming (2024).
Thames starred in David Henrie's independent film Monster Summer. He also starred as Hiccup Horrendous Haddock III in the 2025 live-action remake of How to Train Your Dragon (2010). He is expected to return in its sequel, which is scheduled to be released in 2027. In mid-2025, Thames joined the cast of two comedy films, Nimrods and Idiots, which were both released in August 2026.
Filmography Film
+ Year Title Role Notes 2017 After Omelas Liam 2021 The Black Phone Finney Blake 2024 Incoming Benj Nielsen Monster Summer Noah Reed 2025 How to Train Your Dragon Hiccup Horrendous Haddock III NimrodsTommy Black Phone 2 Finney Blake Regretting You Miller Adams 2026 Idiots Sheridan Kimberley 2027 Hiccup Horrendous Haddock III Post-production2028 Dick Grayson (voice) Post-production Post-production
Television + Year Title Role Notes 2019 For All Mankind Danny Stevens 3 episodes 2020 Evel Robbie Episode: "Pilot" 2021–2022 Walker Young Cordell Walker 3 episodes
Music video Year Title Artist Role 2026 "Bones and All" Mckenna Grace Boy
Accolades AwardYearCategoryFilmResult Fangoria Chainsaw Awards 2023 Editor's Eyeball on the Future Award The Black Phone Saturn Awards 2022 Best Younger Actor in a FilmThe Black Phone 2026 Best Younger Actor in a Film How to Train Your Dragon Washington D.C. Area Film Critics Association 2025 Best Youth Performance How to Train Your Dragon
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