Joy is the lead emotion in Pixar's Inside Out, first released in 2015, a film that follows the emotions inside a young girl's mind as she grows up. Voiced by Amy Poehler, Joy became the film's most recognisable character thanks to her sunny personality and distinctive yellow design. Short clips of her voice spread through reaction videos, edits and meme pages, where a brief burst of optimism works as instant shorthand for happiness. The sound remains popular because it is short, instantly recognisable and easy to drop into almost any light-hearted edit.