But Watson said the account was set up for the sole purpose of "protecting her anonymity and safety".

A spokesman for the 26-year-old Harry Potter star said: "Emma receives absolutely no tax or monetary advantages from this offshore company whatsoever, only privacy."

The wrong Emma? Instead of Emma Stone it could have been Emma Watson starring in the hit La La Land Credit:Getty

Her account came to light after data collated by the International Consortium of Investigative Journalists (ICIJ) was published online for the first time. More than 200,000 offshore account details from Mossack Fonseca, a Panamanian law firm, are now available.

"UK companies are required to publicly publish details of their shareholders and therefore do not give her the necessary anonymity required to protect her personal safety, which has been jeopardised in the past owing to such information being publicly available," Watson's spokesman said.