British illusionist Dynamo, 28, appeared to be taking a stroll on water across the River Thames towards the Houses of Parliament on Saturday night.
Dynamo’s spokesman said photographs of the extraordinary performance are completely genuine.
The stunt was filmed for his new television show, Dynamo: Magician Impossible, which will be broadcast on Watch from July 7.
In the new series, Dynamo will perform a variety of tricks, including transporting a mobile phone into a glass beer bottle, bringing a flutter of paper butterflies to life and transforming snow into diamonds.
Manchester rock legend Ian Brown, Australian singer Natalie Imbruglia and boxer David Haye will all be making guest appearances in the series.