Chewbacca first appeared in Star Wars in 1977 as Han Solo's loyal Wookiee co-pilot, played on screen by Peter Mayhew. Sound designer Ben Burtt created his voice by layering recordings of bears, lions, tigers and other animals, giving the character a growl that felt real without using words. The roar became one of the most recognisable sounds in film, quoted and imitated by fans for decades. Online, clips of the growl spread as a reaction sound for tall, hairy or unexpectedly loud moments, keeping the Wookiee's voice familiar to viewers who may never have seen the films in full.