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Princess Mary of the United Kingdom

1776 – 1857

British princess (1776-1857); daughter of George III

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About Princess Mary of the United Kingdom

Lived 1776 – 1857 (aged 81). Princess Mary of the United Kingdom was a British aristocrat.

Princess Mary, Duchess of Gloucester and Edinburgh (25 April 1776 – 30 April 1857) was the eleventh child and fourth daughter of King George III and his consort Charlotte of Mecklenburg-Strelitz.

She married her first cousin, Prince William Frederick, Duke of Gloucester and Edinburgh, when both were 40, and was his widow in later life. In her last years, her niece Queen Victoria was on the throne as the fourth monarch during Mary's life, after her father and two of her brothers, George IV and William IV. Dying aged 81 at Gloucester House, Weymouth, Mary was the longest-lived and last survivor of George III's fifteen children (thirteen of whom lived to adulthood).

Early life and family

Mary was born on 25 April 1776, at Buckingham Palace, London. Her father was the reigning British monarch, George III. Her mother was Queen Charlotte, the daughter of Charles, reigning Duke of Mecklenburg-Strelitz.

Mary was baptised on 19 May 1776, in the Great Council Chamber at St. James's Palace, by Frederick Cornwallis, the Archbishop of Canterbury. Her godparents were: Landgrave Frederick of Hesse-Cassel (her first cousin once-removed, for whom the Earl of Hertford, Lord Chamberlain stood proxy) The Duchess of Saxe-Gotha-Altenburg (wife of her first cousin once-removed, for whom the Duchess of Argyll, Lady of the Bedchamber to the Queen, was proxy) Princess Charles of Mecklenburg-Strelitz (her third cousin once-removed, for whom the Dowager Countess of Effingham, Lady of the Bedchamber to the Queen, stood proxy).

The king was a devoted father, finding time to regularly visit the royal nursery. Engaging in active play with his young children, he behaved quite informally in contrast to the dignified Queen Charlotte, who had more difficulty abandoning the formal behaviour expected of their class. Despite her outer reserve, however, Charlotte took a role as conscientious as her husband in their children's upbringing. For the royal princesses, the queen carefully oversaw their welfare, education, and development of moral values. Faced with less time due to her public duties and close marriage to the king, she appointed Lady Charlotte Finch to manage the royal nursery and administer her ideas.

According to Flora Fraser, Mary was considered to be the most beautiful daughter of George III; Fraser calls her a "bland beauty". Mary danced a minuet for the first time in public at the age of sixteen in June 1791, during a court ball given for the king's birthday. In the spring of 1792 she made her official debut at court.

Marriage and later life

Mary's upbringing was very sheltered and she spent most of her time with her parents and sisters. King George and Queen Charlotte were keen to shelter their children, particularly the girls. Mary, however, married on 22 July 1816, to her first cousin, Prince William Frederick, Duke of Gloucester and Edinburgh, the son of George III's brother, Prince William Henry, Duke of Gloucester and Edinburgh. Both were aged 40. On their wedding day, Mary's brother, the Prince Regent, raised the bridegroom's style from Highness to Royal Highness, an attribute to which Mary's rank as daughter of the King already entitled her.

William Frederick had initially sought to marry Mary's niece Princess Charlotte of Wales. Charlotte, while interested, was berated by her father, who subsequently also expressed his displeasure to Gloucester and the courtship ended. The historian A. W. Purdue suggests that Mary's motive for marrying her cousin sprang from her dislike of Queen Charlotte's restrictive household. Charlotte observed that the duke "is much in love, & and tells me he is the happiest creature on earth. I won't say [Mary] does as much, but being her own mistress, having her own house, & being able to walk in the streets all delights her in their several ways."

The couple lived at Bagshot Park, but after William's death she moved to White Lodge in Richmond Park. They had no children together.

Death Mary died on 30 April 1857 at Gloucester House, Mayfair, aged 81. She was the last-surviving and longest-lived child of King George III and Queen Charlotte.

Arms As of 1789, as a daughter of the sovereign, Mary had use of the arms of the kingdom, differenced by a label argent of three points, the centre point bearing a rose gules, the outer points each bearing a canton gules.

Ancestry

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Important facts

Birth century
Occupation
Awards
Royal Family Order of King George IV
Also known as
Mary of the United Kingdom, Mary, Duchess of Gloucester and Edinburgh, Mary of Hanover, Princess of the United Kingdom, Princess Mary
moreMary of Gloucester

Family & relationships

Spouse
Prince William Frederick, Duke of Gloucester and Edinburgh
Parent
Charlotte of Mecklenburg-Strelitz
Parent
George III of the United Kingdom

People in Princess Mary of the United Kingdom's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Princess Mary of the United Kingdom's

Frequently asked questions

Who was Princess Mary of the United Kingdom?

British princess (1776-1857); daughter of George III

When was Princess Mary of the United Kingdom born?

Princess Mary of the United Kingdom was born on 25 April 1776 in Buckingham Palace.

When did Princess Mary of the United Kingdom die?

Princess Mary of the United Kingdom died on 30 April 1857 in Gloucester House.

What was Princess Mary of the United Kingdom's occupation?

Princess Mary of the United Kingdom was an aristocrat.

What nationality was Princess Mary of the United Kingdom?

Princess Mary of the United Kingdom was British.

Sources & further reading

· Wikipedia: Princess Mary of the United Kingdom

· Wikidata: Q236586

· DBpedia: Princess Mary, Duchess of Gloucester and Edinburgh

Cite this page

APA: Biography.guide. (2026). Princess Mary of the United Kingdom. https://biography.guide/princess-mary-of-the-united-kingdom/

MLA: "Princess Mary of the United Kingdom." Biography.guide, https://biography.guide/princess-mary-of-the-united-kingdom/.

Chicago: "Princess Mary of the United Kingdom." Biography.guide. https://biography.guide/princess-mary-of-the-united-kingdom/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

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