In his letter, Mr Geller urges Theresa May to stop the Brexit process as soon as possible, claiming that a lot of British people, as well as Uri himself, oppose the idea of Britain leaving the EU.
"I feel psychically and very strongly that most British people do not want Brexit. I love you very much but I will not allow you to lead Britain into Brexit. As much as I admire you, I will stop you telepathically from doing this — and believe me I am capable of executing it," wrote the psychic.
To show the seriousness of his intention, Geller reminded the UK Prime Minister of similar feats he has previously carried out such as bombarding the mind of the Soviet Union's chief nuclear negotiator to influence him telepathically to sign the Nuclear Arms Reduction Treaty. He also added that his power has been validated by the CIA, MI5 and Mossad.
Geller also claims that he is still using the power of his mind to ensure that "Jeremy Corbyn never gets the keys to Number 10 Downing Street".
In his open letter, Geller stressed that he predicted May becoming UK Prime Minister.
"You visited my home in Sonning, where you also lived. Three years before you became Prime Minister, I predicted your victory when I showed you Winston Churchill's spoon on my Cadillac, which I asked you to touch," the illusionist wrote.
Previously, in an interview with Sputnik after discussing a football incident in Scotland, when Mr Geller allegedly moved a ball with his mental powers before a penalty, the psychic said that it was "unethical" and that he would never again use his powers to move a football. However, it seems that such ethical restrictions do not apply to Brexit.