Prince William's full title is His Royal Highness Prince William of Wales KG.

In his military life, Prince William is known as Flight Lieutenant William Wales.

Knight of the Garter (KG)

Prince William is a Knight of the Garter. The Most Noble Order of the Garter, founded by Edward III in 1348, is the senior British Order of Chivalry.

On St George's Day in 2008, The Queen announced that she had appointed Prince William to be a Royal Knight Companion of the Most Noble Order of the Garter.

The Order honours those who have held public office, who have contributed in a particular way to national life or who have served the Sovereign personally..

As the Patron Saint of the Order is St George (patron saint of soldiers and also of England), appointments are always announced on on St George’s Day (23rd April).

Prince William became the 1000th Knight in the Register and was installed on 15th June 2008 at the Annual Garter Ceremony at Windsor Castle. Click here to read the story.

Counsellor of State

Prince William is a Counsellor of State, and was appointed to the position on his 21st birthday, replacing The Princess Royal.

Counsellors of State are members of the Royal Family who temporarily carry out some of the Sovereign's official duties in the absence of The Queen.

This situation may arise if The Queen is suffering from temporary illness or is absent abroad for more than a few days. She may delegate certain functions of the Sovereign in Britain, the dependencies, and other territories to her Counsellors of State. Commonwealth matters go straight to The Queen, wherever she may be.

Any two Counsellors of State may attend Privy Council meetings and they may sign routine documents. But their role is limited. For example, they cannot dissolve Parliament, except on The Queen's express instructions, nor create peers.

Counsellors of State are appointed from among the following: The Duke of Edinburgh and the four adults next in succession (provided they have reached the age of 21).

These are currently The Prince of Wales, Prince William, Prince Harry and The Duke of York.