The 33-year-old footage shows Queen Elizabeth and a very young Prince William watching on as the Duke and Duchess of York are heading off after the ceremony.
The clip quickly shows the Queen running after the young prince as he prances off quickly behind the carriage.
Catching up to him the grandmother grabs his arm pulling him to a halt.
Royal fans have jumped on the footage sharing it across social media.
'Her Majesty as a grandmother is cute,' one comment read.
It is very rare to see the Queen moving at such a fast pace and the people are loving the relatability of Her Majesty as a worried Granny!