Scandal-hit Prime Minister Boris Johnson was booed as he arrived at a concert held at Buckingham Palace in honour of the Queen's Platinum Jubilee.
Footage posted on Twitter showed Mr Johnson taking his seat to a hearty chorus of boos from some members of the public.
This is the second time in recent days that the Tory leader has been jeered during a jubilee event.
On Friday, he and his wife Carrie were met with heckles as they arrived at St Paul's Cathedral for the Platinum Thanksgiving Service.
The Prime Minister has been under increasing pressure to resign following the No10 'partygate' scandal which saw him receive a fine from the Metropolitan Police for attending a rule-breaking birthday gathering in June 2020.
And the Prime Minister's controversies did not escape being mentioned at the platinum party, either, with Comedian Lee Mack referring to the scandal in one of his jokes.
“We are here right outside the gates of Buckingham Palace for the party of a lifetime,” Mack said. “I’ll tell you what – finally we can say the words ‘party’ and ‘gate’ and it’s a positive.”
Stephen Fry also made a political remark which drew gasps, and laughter, from the crowd.
Speaking of the Queen's stoicism, Fry said: “How many local sewage works has our Majesty opened with a bright smile? How many plaques unveiled?
"How many trees planted, ribbons cut, ships launched? How many prime ministers tolerated – for that alone, no admiration is high enough.”
The 'Platinum Party at the Palace' was also filled with jubilation.
At one point, Prince Charles asked the crowd to cheer at the top of their voices in the hope that the Queen would be able to hear from Windsor Castle, where she is currently residing.
"If we cheer loudly enough, she might, might just hear us," Charles said. "So, let's all join together! Louder!"
The evening also featured musical performances from Sir Elton John, Diana Ross, Sir Rod Stewart, Alicia Keys and Duran Duran and was attended by various members of the royal family, along with a host of government officials.
The Queen herself did not attend the event. Prince Charles paid tribute to the Monarch, calling her "Mummy" and describing how “you laugh and cry with us and, most importantly, you have been there for us…”
Charles went on: "The scale of this evening’s celebration – and the outpouring of warmth and affection over this whole Jubilee weekend – is our way of saying thank you – from your family, the country, the Commonwealth, in fact the whole world.
“On behalf of us all, I wanted to pay my own tribute to your lifetime of selfless service.
“Your family now spans four generations. You are our Head of State. And you are also our mother.”
Roughly 10,000 people attended the event, which was ticketed via a public ballot earlier this year.
The Duke of Cambridge also delivered a speech during which he praised the Queen for her "hope" in the future of the planet and thanked members of the royal family for championing environmental issues.
Several famous faces appeared on the giant screens to deliver messages of congratulations to Her Majesty.
Former US First Lady Michelle Obama said: "Whether you were welcoming a nervous First Lady to Buckingham Palace for the first time, or your extraordinary kindness toward our children.
“I feel deeply honoured to have spent time with you over the years. Thank you Ma’am, for your remarkable example.”
Sir Paul McCartney, 79, said: “I love you like many other people, so congratulations and thank you for 70 beautiful years.”
