[Update: The Alamo Drafthouse, which hosted the screening, has posted video of Leonard Nimoy's introduction, which you can watch after the jump.]
Ain't It Cool News reports that Leonard Nimoy snuck into Austin, Texas, on Monday night to screen J.J. Abrams' Star Trek to a stunned crowd that expected to see only about 10 minutes of footage along with a screening of Star Trek: The Wrath of Khan.
Nimoy was joined by Trek writers Roberto Orci and Alex Kurtzman and producer Damon Lindelof to pull off the surprise.
As far as we know, it was the first public screening of the film ever. The world premiere takes place tonight in Sydney.
How was it? Ask AICN. The rest of us will have to wait until May 8, when it opens in North America.