The roar comes from the opening logo of Metro-Goldwyn-Mayer, the Hollywood studio whose lion mascot Leo has appeared before its films since the 1920s. Generations of moviegoers learned to expect a feature presentation the moment the lion opened his mouth inside the circular ribbon. Despite the animal on screen, the recorded roars used for the logo have famously drawn on tiger vocalisations, including Bengal tiger sounds, blended for a fuller and more ferocious tone. That mismatch is part of why the clip survives online as a standalone sound effect.
About this sound
The MGM lion roar sound effect is the iconic big cat roar from the Metro-Goldwyn-Mayer opening logo, used for dramatic intros and movie reveals.
The famous MGM roar is a short, powerful big cat growl that builds into a full open-mouthed roar lasting just over two seconds. Heard over the image of Leo the lion framed in a golden film ribbon, it feels grand, old-Hollywood and instantly recognisable even without the picture. The sound itself is deep and layered, with a throaty rumble that makes a small clip feel huge on screen. Played on its own it works as a joke reveal, a mock-epic entrance, or a sudden warning that something big is about to happen.