The roar comes from Jurassic World: Fallen Kingdom, the 2018 sequel in the Jurassic Park franchise, where the Tyrannosaurus rex remains the series' most recognisable predator. Its bellow was built for large-scale cinema moments, with a deep, layered roar designed to feel both animal and overwhelming on a theatre sound system. After the film, short clips of the roar spread through dinosaur edits, reaction videos, and meme compilations, where a three-second burst could sell a reveal without any dialogue. It remains popular because the T. rex is instantly understood worldwide as the ultimate dinosaur, so the sound needs no explanation.