Harry Potter and the Cursed Child stage play tickets are so sought after, buyers are forking out almost $14,000 for a chance to see the play.

But many are coming away disappointed.

The Guardian newspaper in the United Kingdom reports that tickets are going for as much as £8327 ($A13,970) each for the sold-out London shows.

The face value of the highest-priced ticket is £140 ($A235).

And the producers have issued warnings about counterfeit tickets from scalpers and resale websites, with about 60 ticket holders already having been refused entry.

“From the outset, accessible pricing has been of paramount importance to us,” the play’s producers said in a statement.

“We have already been able to identify and refuse entry to a significant number of people who purchased tickets through resale sites, and will continue to track down touts and refuse entry to anyone who has knowingly bought a ticket from a tout through the secondary market.

“Staff at the Palace Theatre refuse entry for tickets that they are able to identify as resold.”

The producers said the safest place to buy tickets is from the play’s website, and recommended avoiding tickets resold online, through newspapers, or through resale websites.

The play runs over five hours and is split into two parts. Photo: Facebook

Harry Potter and the Cursed Child is set 19 years after the events of the last book, Harry Potter and the Deathly Hallows, running over five hours and split into two parts at London’s Palace Theatre

In August, a new batch of 250,000 tickets for performances through to December 2017 sold out in one day.

There is also an online lottery every Friday in which 40 tickets are released for the following week.