R2-D2 and his companion C-3PO are the only characters to appear in every theatrical Star Wars film. English actor Kenny Baker played the character in all three original Star Wars films and received billing credit for the character.
See also: Star Wars: Droids, Lego Star Wars: The Quest for R2-D2, Droid (Star Wars), Star Wars: Episode II – Attack of the Clones, Star Wars Holiday Special, Lego Star Wars.