R2-D2，是出现于电影星际大战系列中的一个机械人角色，常被简称为R2。R2-D2是少有的几个出现于所有星球大战电影的角色（除它之外，7部电影中都出现的角色包括R2的机器人同伴C-3PO，而R2-D2是唯一一个在全七部电影中都以同一个形象登场的角色。）。R2的首次出场是在星际大战首部曲：威胁潜伏中，当安纳金向帕德梅展示了C-3PO的时候。在正传电影中，R2-D2由Kenny Baker饰演。在正传六部曲中，几乎每部中也有帮助主角脱险的时候。在动画复制人战争中，R2-D2经常能够把困难重重的任务完成，在波巴费特暗杀魅使•云度和安纳金•天行者时，安纳金拜托R2-D2回绝地神殿求救，结果R2-D2在避开波巴费特的追击后，成功回到绝地神殿找救援，安纳金对R2的信任程度，就连云度大师也感到佩服。

R2-D2 or Artoo-Detoo is a fictional robot character in the Star Wars universe created by George Lucas, who appears in the original trilogy, the prequel trilogy, and the sequel trilogy. As a charismatic and mischievous astromech droid (referred to in the novel as a 'thermocapsulary dehousing assister'), R2-D2 is a major character appearing with his protocol droid companion, C-3PO, as the only two characters to appear in all seven Star Wars films. Throughout the course of the films, he joins or supports Anakin Skywalker, Luke Skywalker, Princess Leia, Padmé Amidala, and Obi-Wan Kenobi in various points in the saga.