GettyPrincess Eugenie made a secret visit to watch mysterious theatre show You Me Bum Bum Train[/caption]
The hour-long immersive event is described as “an experience for one audience member at a time”.
Its contents — said to be physically challenging and intense — are a secret with participants asked to sign a non-disclosure agreement.
Even its precise location is not shared, taking place in a disused London office block.
But a source said Eugenie, the younger daughter of the Duke and Duchess of York, was part of the “largest celebrity group yet” when she attended the show last weekend.
They added: “It’s getting busier and busier with A-listers but her royal status makes Eugenie our biggest name this run.”
The plot of You Me Bum Bum Train is also secret and scenes or scenarios change depending on the audience members — or “passengers” — and the guest performers on the night.
The production — created by pals Kate Bond and Morgan Lloyd in 2004 — has achieved cult status due to its mysterious nature.
You Me Bum Bum Train is described as “a magical journey in which people are able to go beyond their everyday lives and have a range of experiences that would not normally be possible within a lifetime”.
How tall are the Royals?
How tall are the Royals? - How tall are the Royals? And the two that top 6ft - royals
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