Theatre impresario Andrew Lloyd Webber has expressed fears for the commercial future of London's West End.
Lord Lloyd-Webber is currently hunting for a new West End star
"Something completely different has to happen," he said. "There's going to be a cataclysmic change in entertainment in the next five years."
Speaking to the Radio Times, the Evita composer said he did not have "a huge desire" to write another musical.
The 58-year-old is currently searching for an unknown to play the lead role in his production of The Sound of Music.
The hunt is being recorded in a BBC One series, How Do You Solve A Problem Like Maria?, hosted by Graham Norton.
Lord Lloyd-Webber, whose 1978 musical Evita was recently revived in the capital, said modern musicals had moved into a "different direction".
"Can you name me an interesting new one?" he asked. "The feel-good factor seems to be the main thing.
"Only three shows are doing any business - Billy Elliot, Phantom [of the Opera] and The Lion King. Some shows are losing £100,000 a week."
Elena Roger plays the title role in the current Evita production
Last year the composer took control of seven West End theatres, including the London Palladium and the Theatre Royal Drury Lane.
The latter, he said, was a Grade I listed building that would not be viable without a major renovation costing more than £20m.
"No commercial person can find that sort of money and the theatre could never generate it, so what's the future?"
The Sound of Music - famously filmed in 1965 with Julie Andrews - is scheduled to open at the Palladium in November.