Movies
'High School Musical 2'
The third instalment is currently filming in Utah and opens in US cinemas on October 24.
Executives said the new film is likely to be a TV movie like the first two, but that could change at a later date, claims The Hollywood Reporter.
They also said they were unsure whether the original cast - which includes Zac Efron and Vanessa Hudgens - will return, although new characters introduced in the third movie are expected to appear again.
Disney Channel Worldwide president Rich Ross said: "We are writing High School Musical 4. Are we going to have all the cast back? Probably not. Will we have some of them? I hope so."
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