The group started a conversation with the 93-year-old when they saw her walking with her protection officer Richard Griffin at her holiday home in Aberdeenshire, Scotland. The tourists did not realise who they were speaking to when they asked whether she lived nearly. When she replied that she did, they then asked if she had ever met the British head of state.
Not wanting to give herself away, the Queen pointed towards Mr Griffin and said “No, but this policeman has.”
The group then left a short while later without clocking who they had just spoke to.
The Queen was even wearing her well-known casual attire of a headscarf and tweeds.
Mr Griffin, who has worked with the Royal Family for more than 30 years, shared this story with The Times.
The Queen had a funny response to a group of tourists who did not recognise her (Image: GETTY)
The Queen was wearing her usual headscarf and tweed (Image: GETTY)
The Queen leads a more low-key lifestyle when she stays at Balmoral.
The castle has been a residency of the British royal family since 1852.
The grounds cover an area of around 50,000 acres.
The estate also includes forestry and farmland, along with herds of deer, Highland cattle and ponies.
The Queen looked stunning in pink as she attended church in Balmoral with Kate (Image: GETTY)