It was previously believed that no former cast members from the old Star Trek franchise would be appearing in director J.J. Abrams's upcoming sequel Star Trek 2. New images from the set have rendered this information null and void, as both Leonard Nimoy and Zachary Quinto were spotted in their respective Spock outfits. Producer Roberto Orci tweeted these photos direct from the deck of the Starship Enterprise, on a sound stage at Paramount Studio, and he also included a photo of a Star Fleet janitor (actually one of the producers on the first movie), along with a pic of J.J. Abrams and Roberto Orci doing on-set rewrites. Check them all out below.

Leonard Nimoy on the set of Star Trek 2
Zachary Quinto on the set of
Star Trek 2 Set Photo #1
Star Trek 2 Set Photo #2
Star Trek 2 Set Photo #3