R2-D2 is a fictional robot in the Star Wars franchise.
R2-D2 or R2D2 may also refer to:
R2d2 (mouse gene) Right 2 Dream Too, a homeless people's organization in Portland, Oregon, US Phalanx CIWS, a naval defensive weapon system, nicknamed R2-D2 Staatstrojaner, a German state-sponsored trojan horse computer program, nicknamed R2-D2