The Queen's reaction to Prince Charles calling her 'Mummy' was priceless

He called her on stage and managed to embarrass the head of the Church of England with just one word.

As reported by Metro UK, Queen Elizabeth II gave a priceless reaction by rolling her eyes when her son, Prince Charles, addressed her as 'Mummy' during her 92nd birthday celebration at the Royal Albert Hall on April 21.

The Queen joined 69-year-old Charles on stage for the star-studded show's climax and started his piece by addressing the Queen as 'Your Majesty.'

After a brief pause, Charles looked towards the Queen and called her by the familial term inducing a reaction from the monarch. As Elizabeth broke her formal stance for a brief moment, the crowd erupted in cheer and broke into applause.

"I have a feeling that in 1948, when you were 22, you didn’t somehow expect that at the age of your 92nd birthday, to find your son in his 70th year."

Prince Charles, YouTube, April 21, 2018

The Queen broke into a smile when her son encouraged the crowd to give her three resounding cheers. She was accompanied on stage by a plethora of stars from show business.

The celebrities that livened up the ceremony included the likes of pop star Kylie Minogue, Sir Tom Jones, Craig David, Sting and Shaggy.

Shaggy's performance of his hit song, Mr. Boombastic, in the presence of the monarch, triggered some laughs from Prince Harry and his fiance, Meghan Markle.

At the event, Prince Harry took the stage and joked that his doting grandmother was not an easy person to buy gifts for.

The concert was quite a retreat for the Queen in an already busy week. She has been keeping herself busy hosting 53 countries for the Commonwealth Heads of Government Meeting.

Prince William attended the ceremony by himself as Kate Middleton was ready to deliver their third child. Middleton gave birth to their son on April 23 and will now be busy to prepare for the celebrations of their seventh anniversary.