Princess

After the accession of King George I to the British throne, the children, grandchildren, and male-line great-grandchildren of the British sovereign were automatically titled "Prince or Princess of Great Britain and Ireland" and styled "Royal Highness" (in the case of children and grandchildren) or "Highness" (in the case of male line great-grandchildren).

Queen Victoria confirmed this practice in letters patent dated 30 January 1864 (the first Act of the Prerogative dealing with the princely title in general terms).

On 31 December 2012, Queen Elizabeth II issued letters patent enabling all children of the eldest son of the Prince of Wales to enjoy the princely title and style of "Royal Highness", as opposed to only the eldest son.

[8] Queen Elizabeth II issued letters patent dated 21 August 1996, stating that any woman divorced from a Prince of the United Kingdom would no longer be entitled to the style "Royal Highness".

For example, throughout the 1997 film Life Is Beautiful the protagonist Guido calls his beloved Dora "principessa", Italian for "princess".