Considering all the speculation that surrounded the casting of the upcoming Star Trek movie, it wouldn't seem like a stretch to think that Tom Cruise might be one more late addition to the roster.

"Tom visited the set of the movie and chatted with J.J. Abrams," a source close to the actor said. The last time Cruise was spotted on a set for a movie he wasn't said to be signed on for - Tropic Thunder - it turned out he had a small role. Unfortunately for Cruise fans, the visit to the Star Trek set was just a social call -- Cruise and Abrams are friends, and apparently, Cruise is a fan of the television series and in particular, Mr. Spock.

"He asked J.J. if there's a way he can meet Leonard Nimoy. He said he'd always really respected his work," said the source.