R2-D2

R2-D2 is an astromech droid employed at Star Tours. The most widely accepted story is that he and C-3PO retired to Star Tours sometime after the events of Return of the Jedi. He is a major character in all six Star Wars films, serving as C-3PO's counterpart.

Mickey's 50
Along with C-3PO, R2 makes an appearance in a segment about Mickey Mouse's television career.

The Muppet Show
Along with C-3PO, Luke Skywalker (and Mark Hamill), and Chewbacca, R2 makes a guest appearance in an episode of The Muppet Show.

ANT Farm
R2 and C-3PO make an appearance in the ANT Farm episode "ScavANTger Hunt".

Attractions
R2-D2 was heard in the onboard soundtracks for the PeopleMover and its replacement, Rocket Rods, as those attractions' respective vehicles passed through Star Tours at Disneyland.

He is also a meetable character during Star Wars Weekends.