New clip also shows a better look at the alien planning to invade earth

May 24, 2012 14:25 GMT  ·  By

Vince Vaughn dropped by Conan O'Brien the other day – unannounced, apparently – and presented his fans with a surprise: a new trailer for this summer's comedy “The Watch,” in which he plays one of the leads.

You can see it in full above – the trailer doesn't start until a few minutes into the video.

The film stars Ben Stiller, Vince Vaughn, Richard Ayoade and Jonah Hill as a couple of concerned citizens who start a neighborhood watch to keep an alien invasion at bay.

This new video includes a pretty decent look at one of the aliens and that's a first because the previous two trailers didn't.

Initially called “Neighborhood Watch,” the film will now be released simply as “The Watch,” with Fox deciding to do so in the aftermath of the shooting of Trayvon Martin.

“The Watch” will be out on July 27.