Shatner uncertain about 'Star Trek 2' cameo

William Shatner has confessed that he doesn't believe he will be asked to make an appearance in the Star Trek sequel.

The actor, whose Trek co-star Leonard Nimoy played an integral role in director J.J. Abrams's franchise reboot, told the Herald Sun that the sci-fi series may have "gone beyond" his involvement.

"I would be so interested in doing it, especially with that wonderful director J.J. Abrams, but I don't see how it's possible and maybe we all have gone beyond that," Shatner said.

The 79-year-old revealed that he is making a documentary wherein he talks to all the captains of the USS Enterprise to "find a common denominator and in the meantime have some fun talking to them about ... their lives".

Reminiscing about his role as James T. Kirk in the franchise, Shatner added: "I think of Star Trek at its best as being really good and when I was at my best I was good in it. There were some if not many missteps, but at its best it was really terrific."