At the start of the game, you will have two characters: Princess Leia and Captain Antilles.
As you progress through the levels, you will unlock different characters. The list reads as follows: Luke Skywalker (Jedi, Tatooine, Bespin, Stormtrooper, Dagobah, Endor), Han Solo (Skiff, Bespin, stormtrooper, normal, Endor, Hoth), Princess Leia (normal, Hoth, Endor, Bespin, slave, Boushh), Lando Calrissian (normal, Skiff), Wicket, Ben Kenobi (normal, Ghost), Captain Antilles, rebel trooper, R2-D2, C-3PO, Rebel friend, Greedo, Boba Fett, Stormtrooper, IG-88, Imperial shuttle pilot, Grand Moff Tarkan, Darth Vader, Beachtrooper, Emporer Palpatine,4Lom, Bossk, and Dengar.
You can also use use old save, which is an extra in the cantina for 250000 and which allows you to use all the characters from Lego Star Wars. You must have a saved Lego Star Wars game on your memory card or computer to use this extra.
Note: you can only use these characters in Free Play of any levels.
Note 2: In space, you get a Y-Wing, X-Wing, Snowspeeder, Millenium Falcon, TIE Fighter, and TIE advanced.