Jurassic Park fans will notice, throughout each of the released Jurassic World trailers and TV spots, the roar of the Indominus Rex has been masked by either a movie-roar of a Velociraptor or the Tyrannosaurus Rex. None of these are actually what the Indominus Rex will sound like in the film.
However, thanks to Jurassic Collectibles on YouTube, we now know what the Indominus Rex will sound like in Jurassic World thanks to their very in-depth review of the movie-official Jurassic World Book & App product - Where Dinosaurs Come to Life. The book itself ties into an app that you can download, which allows you to unlock special features and interactive content. At the end of the video however, they unlock Indominus Rex and through the interactive app, activate the Dinoraur's terrifying roar.
If you don't mind potential spoilers (if this can be counted as such), check out the video below!
Jurassic World Rebirth hits theaters July 2nd, 2025! You can watch all the available movie trailers and TV spots for Rebirth here!
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