Simon Pegg is tempted to big up Scotty's role in Star Trek 3.
The actor - who is also co-writing the script for the next film with Doug Jung - said that he now realises he can't make the new film all about his own character.
Speaking on The Graham Norton Show, the actor revealed: "It's hard because the temptation is to big up your own part but it would look really obvious if the film was all me!"
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He added that he got a lot of help from his family to master Scotty's Scottish accent, but that director JJ Abrams still needed to take him to one side while filming 2009's Star Trek.
"My wife was my dialect coach but my father-in-law wanted me to get a lot of Scottish phrases in so gave me a book called The Patter, basically a Scottish translation book with lots of weird words, and I was trying to filter them in.
"JJ (Abrams) took me aside one day and said, 'Simon, people have got to understand you!'"
Justin Lin is set to direct the new Star Trek film, following the departure of Abrams to direct Star Wars: The Force Awakens.
It was recently suggested that the film will be titled Star Trek Beyond, but this has yet to be confirmed.
The Graham Norton Show will air tonight (May 15) at 10.35pm on BBC One.
