The set of eight, illustrated by artist Malcolm Tween, will be released to commemorate the upcoming movie, Star Wars: The Last Jedi, which launches in December.
Maz Kanata, Chewbacca, Supreme Leader Snoke, R2-D2 and C-3PO are among those that will appear on the collection.
Four of the stamps will have details in fluorescent ink that will only be visible under a UV light.