C-3PO or See-Threepio  is a humanoid robot character in the Star Wars franchise. He is a protocol droid designed to assist in etiquette and translation, and is fluent in over six million forms of communication. Created by George Lucas, the character appears in all nine films of the Skywalker Saga—which includes the original trilogy, the prequel trilogy and the sequel trilogy. Anthony Daniels portrays C-3PO in all the Skywalker Saga films and the standalone film Rogue One. Daniels also voices the character in the animated film The Clone Wars. In addition to the films, C-3PO has appeared in television series, novels, comic books, and video games.

Star Wars is an American epic space opera media franchise created by George Lucas, which began with the eponymous 1977 film and quickly became a worldwide pop culture phenomenon. The franchise has been expanded into various films and other media, including television series, video games, novels, comic books, theme park attractions, and themed areas, comprising an all-encompassing fictional universe. Star Wars is one of the highest-grossing media franchises of all time.