How Old Is Prince William – Age, Birthday and Family Facts

How Old is Prince William Today?

Prince William, the heir apparent to the British throne, was born on 21 June 1982, making him 43 years old as of 2025. His age has become a point of public interest, particularly following a challenging period for the royal family in 2024 when both his wife and father were diagnosed with cancer. William marked his 43rd birthday on 21 June 2025, describing the preceding year as “quite an extraordinary one” as he navigated significant family health challenges while expanding his responsibilities as heir apparent.

William’s birth marked a significant moment in modern royal history. He was the first direct heir to the British throne to be born in a hospital, arriving at St Mary’s Hospital in Paddington, London, at 9:03 pm, weighing 7 lb 1½ oz. His Gemini zodiac sign places his birthday firmly within the period of late spring, a detail that resonates with the astrological profile of those born between late May and late June.

As the elder son of King Charles III and the late Diana, Princess of Wales, Prince William occupies a unique position in the British monarchy. He is described as one of the most popular members of the royal family and has come to personify the modern monarchy through his various initiatives and public engagements.

Age Overview

• Born on 21 June 1982 at St Mary’s Hospital, Paddington, London
• First direct heir to the British throne born in a hospital setting
• Reached the milestone age of 40 in June 2022
• Celebrated his 42nd birthday in June 2024 amid family health challenges
• Marked his 43rd birthday on 21 June 2025
• Two years older than his brother Prince Harry, born on 15 September 1984
• Eleven years older than his wife Catherine, Princess of Wales, born on 9 January 1982

When Was Prince William Born?

Prince William Arthur Philip Louis was born on 21 June 1982 at St Mary’s Hospital in Paddington, London. His birth was announced publicly on 22 June 1982, and he was immediately third in line to the throne behind his father, then Prince Charles, and his grandfather, Prince Philip, Duke of Edinburgh. The timing of his birth at 9:03 pm placed him within the Gemini zodiac category, spanning those born between late May and late June.

Birth Details and Location

The choice of St Mary’s Hospital for William’s birth was historically significant. He became the first direct heir to the British throne to be born in a hospital, a departure from the tradition of royal births occurring at home or in royal residences. The hospital setting reflected a broader shift in royal practices during the late 20th century.

William’s birth weight of 7 lb 1½ oz was within normal parameters for a full-term infant. His time of birth, recorded at 9:03 pm, added precision to his official biographical record, a detail that has been consistently documented across multiple royal sources.

Zodiac and Personality Context

As a Gemini born on 21 June, William falls at the cusp of the zodiac, sharing characteristics associated with the air sign. Gemini is traditionally linked to qualities of adaptability, communication, and intellectual curiosity. Those familiar with astrological interpretations sometimes note these traits alongside William’s documented interests in mental health advocacy, environmental work through the Earthshot Prize, and his engagement with various charitable causes.

How Old is Prince William Compared to His Family?

Comparing Prince William’s age to those of his immediate family reveals interesting generational dynamics within the British royal family. As the elder son of King Charles III, William occupies the position of heir apparent, a role that carries significant responsibilities and public interest.

Age Comparison with Prince Harry

Prince William is two years older than his younger brother, Prince Harry, Duke of Sussex. William was born on 21 June 1982, while Harry was born on 15 September 1984. This two-year age gap shaped their childhood experiences at shared schools and their concurrent service in the British military. Both brothers served as best man at each other’s weddings, with William standing alongside Harry at his 2018 wedding to Meghan Markle.

Age Comparison with Catherine, Princess of Wales

Prince William and Catherine share the same birth year, though Catherine was born earlier in the year. Catherine Elizabeth Middleton was born on 9 January 1982, making her approximately five months older than William. They met as students at the University of St Andrews in Scotland, where William was studying geography and Catherine was studying art history. Their relationship, which began in 2003, culminated in their wedding at Westminster Abbey on 29 April 2011.

Generational Position in the Royal Family

As the eldest son of King Charles III, Prince William stands as the most prominent figure in the younger generation of the British royal family. His three children—George, Charlotte, and Louis—represent the next generation of potential heirs. George, born 22 July 2013, is now 12 years old and second in line to the throne. Charlotte, born 2 May 2015, is 10, and Louis, born 23 April 2018, is 7. This generational progression ensures continued public interest in William’s age and life milestones as his children grow and assume more public roles.

What Are Key Facts About Prince William?

Beyond his age, Prince William’s biography encompasses a range of significant details that define his public persona and royal role. His full designation reflects the multiple titles he holds following his father’s accession to the throne.

Full Name and Official Titles

Prince William’s full name is William Arthur Philip Louis, Prince of Wales, Duke of Cornwall and Cambridge, Earl of Strathearn and Baron Carrickfergus. Following King Charles III’s accession to the throne on 8 September 2022, William automatically became Duke of Cornwall and Duke of Rothesay. The following day, he was formally created Prince of Wales, the title traditionally associated with the heir apparent. He previously held the title Duke of Cambridge, granted to him immediately before his 2011 wedding to Catherine Middleton.

Education and Early Life

William’s educational path included Wetherby School, Ludgrove School, and Eton College, institutions known for educating members of the British upper class and aristocracy. He went on to earn a Master of Arts degree in geography from the University of St Andrews in Scotland. It was during his university years that he met Catherine Middleton, then studying art history. His time at St Andrews, from 2001 to 2005, was notably unremarkable academically by his own later admission, though he successfully completed his degree.

Physical Attributes

While precise height measurements for Prince William vary across sources, he is widely described as standing approximately 6 feet 3 inches (191 cm) tall, making him slightly taller than his brother Prince Harry and average for the male line of the royal family. His build has been described as athletic, with public appearances showing a man of substantial physical presence appropriate to his ceremonial roles.

Prince William: Key Milestones

A chronological look at Prince William’s life reveals the major moments that have defined his public career and personal development.

1. 21 June 1982: Born at St Mary’s Hospital, Paddington, London, third in line to the throne
2. 1991: Began formal education at Ludgrove School after attending Wetherby School
3. 1995: Started at Eton College, joining his brother Prince Harry
4. 2001: Enrolled at University of St Andrews to study geography
5. 2003: Began dating Catherine Middleton
6. 2005: Graduated with a Master of Arts in geography
7. 2006: Joined the Royal Military Academy Sandhurst
8. 2008: Completed helicopter training, becoming an RAF pilot
9. 29 April 2011: Married Catherine Middleton at Westminster Abbey
10. 22 July 2013: Son Prince George born
11. 2 May 2015: Daughter Princess Charlotte born
12. 23 April 2018: Son Prince Louis born
13. 8 September 2022: Father King Charles III ascended the throne; William became Duke of Cornwall and Duke of Rothesay
14. 9 September 2022: Formally created Prince of Wales
15. June 2024: Celebrated 42nd birthday amid family health challenges
16. 21 June 2025: Marked 43rd birthday

What We Know and What Remains Unclear

Why Prince William’s Age Matters

Prince William’s age carries significance beyond mere demographic data. As the heir apparent, his age directly correlates with the timeline of the British monarchy’s transition. When William was born in 1982, he was third in line to the throne. Today, as his father ages and assumes the ceremonial duties of kingship, William’s role has shifted from that of a spare to the indispensable second in command of the monarchy.

The public interest in William’s age also reflects the human element of royal coverage. Readers tracking his birthday each year are effectively following a life trajectory that will culminate in his eventual accession to the throne. His age milestones—his 40th birthday marking a new chapter, his 42nd birthday during family health challenges, and his 43rd birthday as a period of reflection—resonate with audiences who see their own life transitions mirrored in the royal family’s narrative.

Moreover, William’s position as a father of three young children means that his age intersects with questions about the future of the monarchy. His children will grow into their roles as potential future royals, and public interest in their ages and development runs parallel to the interest in William’s own aging process.

Official Sources and Statements

Multiple authoritative sources have documented Prince William’s birth date and age. Wikipedia’s entry on William, Prince of Wales, lists his date of birth as 21 June 1982, citing consistent records across royal and academic sources. Britannica’s biographical entry confirms this information, as do official statements from the royal household.

“He was the first direct heir to the British throne to be born in a hospital.”

— Wikipedia, William, Prince of Wales

“He is described as one of the most popular members of the British royal family and has come to personify the modern monarchy.”

— Britannica, William, Prince of Wales

News coverage from ITV News during William’s birthday celebrations has provided contemporary documentation, reporting on his 42nd birthday in June 2024 and noting the challenging circumstances of that year when both his wife and father were diagnosed with cancer. His 43rd birthday in June 2025 was described as falling during “quite an extraordinary year” as he navigated these family health challenges while expanding his royal responsibilities.

Summary

Prince William, born on 21 June 1982, is currently 43 years old and occupies the position of heir apparent to the British throne as the eldest son of King Charles III. His birth at St Mary’s Hospital in Paddington marked a first in royal history, and his life has been documented with unprecedented public interest throughout his years. From his education at elite British institutions to his military service, marriage to Catherine Middleton, and fatherhood of three children, William’s age has coincided with each major life milestone. As the monarchy prepares for future transition, understanding William’s age and life trajectory provides context for the institution’s evolution. For those tracking today’s date and its significance, What Is the Date Today – Current Date, Day, Time Zone Guide offers additional context on how such royal occasions align with the calendar.

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