Born in Lower Hutt, New Zealand, in 2002, Julian Dennison is one of the rare talents who made a name for himself in the international arena in his early twenties. The first big step that determined the course of his career was the 2016 New Zealand film Savages on the Run. The naturalness and perfectly timed sense of comedy he displayed in this independent production directed by Taika Waititi put him on the radar of producers around the world. The real leap forward came in 2018 with Deadpool 2 starring Ryan Reynolds. Dennison played the character Firefist, also known as Russell Collins, in the film; He effectively conveyed this angry, defenseless, yet funny young man to a large audience. Establishing a solid chemistry with Reynolds in this chaotic and entertaining continuation of the Marvel universe revealed the young actor's adaptability to big-budget productions. Dennison's versatility wasn't limited to action and comedy. In 2021, Godzilla vs. directed by Adam Wingard. While he joined the giant creature universe with his role as Josh Valentine in Kong, he also appeared in the animated series Star Wars: The Bad Batch in the same year with his voice performance. In 2024, he played the character of Danny in Y2K, directed by Kyle Mooney, alongside Jaeden Martell and Rachel Zegler; This disaster comedy about the panic of 2000 showcased Dennison's approach to period comedy. In 2025, he signed one of the most iconic projects of his career: he played Fishlegs in the live-action adaptation of How to Train Your Dragon. Easily navigating both animation, live action and voice-over fields, Dennison continues to be a talented name with a long career path ahead of him, who managed to settle in the center of Hollywood without ever losing his New Zealand identity.