Unfortunately, William Shatner will not be appearing in a cameo in Star Trek Beyond.
The actor who played Captain James T. Kirk in the Star Trek series had been the subject of a lot of speculation relating to his popping in the the movie. In a recent interview, Shatner revealed that he will not be appearing in any form in Star Trek Beyond. Around the occasion of the fiftieth anniversary of the series, Shatner spoke to SFX about the rumor. "There was never a conversation," he said. "It would have been interesting to see what their fertile imaginations could have done with somebody who is 20 years older than when Captain Kirk died [as he did in Star Trek: Generations] and how they would have explained the difference in appearance. But that never came up. I'm sure they must have thought of it one time or another but I never had a substantial conversation about replaying the role."
Star Trek Beyond is the third entry in the rebooted sci-fi franchise, which already includes Star Trek (2009) and Star Trek: Into the Darkness (2013). The first two were helmed by J.J. Abrams, who's now busy heading up the Star Wars sequels, so this one is directed by Fast & Furious reviver Justin Lin with the familiar crew of Kirk (Chris Pine), Spock (Zachary Quinto), Bones (Karl Urban), Scotty (Simon Pegg), Uhura (Zoe Saldana), Sulu (John Cho) and Chekov (Anton Yelchin) all set to return.
One new face to look forward to will be Idris Elba, although nothing is known about his character right now. He's being played as the surprise card much like Benedict Cumberbatch in Star Trek Into the Darkness.
In other latest casting news, it was revealed that Lydia Wilson will also be joining the crew, but little is known about her character so far.
The movie has been written by Pegg and filming for it has wrapped.