Vladimir Putin and other Kremlin officials have been blacklisted from Buckingham Palace, following the Russian invasion of Ukraine earlier this year.
Dignitaries from Belarus and Myanmar have also been ruled out by the palace, while Iran will only be represented at the funeral by its ambassador.
Around 500 dignitaries from around the world – including senior politicians and royals – will attend the service at Westminster Abbey on Monday 19 September.
A government person told the Metro site: “This is the biggest international event we have hosted in decades.”
Australian Prime Minister Anthony Albanese, New Zealand Prime Minister Jacinda Ardern and her Canadian counterpart Justin Trudeau have confirmed their attendance at the upcoming funeral.
US President Joe Biden will also attend the service in Westminster with First Lady Jill Biden.
The Bidens paid a fiery tribute to the monarch after her death on Thursday, September 8, saying she “defined an era.”
They expressed it in a statement: “In a world of constant change, she was a steadfast presence and a source of comfort and pride to generations of Britons, including many who have never known their country without her. An enduring admiration for Queen Elizabeth II united people across the Commonwealth. The seven decades of his history-making reign witnessed a time of unprecedented human advancement and the march forward of human dignity.”
She added: “She was the first British monarch with whom people around the world could feel a personal and immediate connection, whether they heard her on the radio as a young princess speaking to children in the UK, or met around their televisions for his coronation, or watching his latest Christmas speech or his Platinum Jubilee on their phones. And she, in turn, dedicated her entire life to serving him.”