Tribbles aren't the latest trouble for actor William Shatner, best known for his role as Capt. James T. Kirk of Star Trek.

No, what's getting him sued for potentially hundreds of thousands of dollars in Woodford Circuit Court is, well, frozen horse semen.

Shatner's second wife, Marcy Lafferty Shatner, whom he divorced in 1995, is suing him for breach of contract over the breeding privileges of three American saddlebred stallions.

In a civil suit filed late last month, Lafferty claims that Shatner, an American saddlebred horse breeder who has owned Central Kentucky horse farms since the mid-1980s, broke an agreement in their 1995 divorce settlement that specifies those privileges.

Shatner, 72, who lives in Lexington and Studio City, Calif., has not yet filed a response to the suit.