Mason Thames (born July 10, 2007) is an American actor. He played the lead role in Scott Derrickson's horror film, The Black Phone (2021). The role garnered him widespread acclaim, and the film received generally positive reviews from critics. He is set to reprise his role in the sequel. He also featured as a Young Walker in the first two seasons of Walker. He starred in the 2024 high school comedy Incoming as well as an indie feature directed by David Henrie, starring alongside Mel Gibson in Monster Summer. He will also star in a live-action adaptation of How to Train your Dragon as Hiccup Horrendous Haddock III, alongside Nico Parker, who will be playing Astrid Hofferson.