Any tourist (or local!) lucky enough to pass by Buckingham Palace on Sunday were in for a treat!
For the first time ever, the Royal Navy sailors performed the iconic Changing Of The Guard ceremony, with 86 sailors from 45 different parts of the navy performing the honoured duty.
The Telegraph said that the Changing Of The Guard has been taking place since King Charles II was restored to the throne in 1660, but it's normally done by one of the first Good Guards Regiments from the army's Household Division.
Visitors to London flock to the palace every day to watch the ceremony, which is done in full uniform and with drums, bugles and other instruments. On this occasion, the sailors marched through the gates to the theme tune of hit series Game of Thrones played by the Band of the Royal Marines.
The Captain of the Queen's Guard was Lieutenant Commander Steve Elliott, who is believed to be the first from the navy to have fulfilled the role since Sir Walter Raleigh in 1587.
The BBC said that the navy was asked to perform the ceremony to mark 2017 as the Year of the Navy, which former defence secretary Sir Michael Fallon has called 'the start of a new era of maritime power.
Watch the amazing video below: