Current ages and verified birth dates
As of 2025, Prince William, Duke of Cambridge, is 43 years old, born 21 June 1982. Catherine, Princess of Wales, is 43 years old, born 9 January 1982. Both share the same year of birth and are currently the same age. The following sections outline their birth dates, how age is determined across time zones, and key milestones that define their public timelines.
Age basics: how birthdays and time zones affect age
Age is calculated as the number of full years completed since birth according to the Gregorian calendar. A person born before 29 February in non-leap years ages on 1 March in common years; otherwise they age on their actual birthday. Time zones can shift the calendar date by one day in different regions, although for public records a birth date in the local calendar is standard. For William and Kate, each has passed their birthday in 2025, making them 43 for the current year.
Leap year nuance
Leap years add a day every four years, but age is counted by completed years, not by the exact number of days. This means that in non-leap years, a 29 February birthday is treated as 1 March for age purposes; in leap years it is counted on the actual date. For William and Kate, this nuance is minor because their birthdays fall outside February, but it is common for age calculations to vary slightly depending on context.
Prince William, Duke of Cambridge: birth and age context
Prince William was born on 21 June 1982 in St Mary’s Hospital, London. He is the elder son of Prince Charles (now King Charles III) and Diana, Princess of Wales. At birth he became third in line to the throne; as of 2025, he remains the heir apparent after his father. His age has been tracked through public records, official biographies, and consistent reporting by credible outlets.
Key milestones tied to age
William turned 18 in 2000, triggering certain official duties. He married Catherine Middleton in 2011 at age 29 and became a father in 2013 with the birth of Prince George at about age 31. In 2025, at 43, he balances royal obligations with family life while supporting long-term charitable priorities focused on mental health, emergency response, and conservation.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Full name | Prince William Arthur Philip Louis | Official |
| Date of birth | 21 June 1982 | Official birth record |
| Place of birth | St Mary’s Hospital, London, United Kingdom | Official |
| Current age (2025) | 43 years old | Calculated from birth date |
| Line of succession | Heir apparent to the British throne | Official succession list |
| Marriage | married Catherine Middleton, 29 April 2011 | Official record |
| Children | Prince George, Princess Charlotte, Prince Louis | Official family statement |
Kate Middleton, Princess of Wales: birth and age context
Kate Middleton was born on 9 January 1982 in Berkshire, England. She married Prince William in 2011 and became a mother to Prince George in 2013, followed by Princess Charlotte in 2015 and Prince Louis in 2018. Her age has been consistently documented through official and media channels. In 2025, at 43, she continues her role as a working member of the royal family, focusing on early childhood, arts, and charity patronage.
Notable career and age-related milestones
- Graduated from university in 2004 at about 22 years old.
- Engaged to William in 2010 at about 28 years old.
- Married in 2011 at about 29 years old.
- First child born in 2013 at about 31 years old.
Shared timeline: William and Kate at comparable ages
Because William and Kate were born within eight months of each other in 1982, they have aged through major life events in parallel. Key comparisons include meeting at university in 2001 around age 19–20, engagement in 2010 at about 28, marriage in 2011 at about 29, and becoming parents starting in 2013 at about 31. These synchronized milestones underscore their long-term relationship and shared public timeline.
| Event | Prince William’s age | Kate Middleton’s age | Year |
|---|---|---|---|
| University meeting | 19–20 | 19–20 | 2001 |
| Engagement | 28 | 28 | 2010 |
| Wedding | 29 | 29 | 2011 |
| First child | 31 | 31 | 2013 |
| Second child | 33 | 33 | 2015 |
| Third child | 36 | 36 | 2018 |
| Current age (2025) | 43 | 43 | 2025 |
Relationship overview and family context
William and Kate began dating while students at the University of St Andrews in Scotland, developing a relationship that progressed through long-distance periods before engagement in 2010. Their marriage in 2011 drew global attention and is often described as a modern royal partnership. As of 2025, they have been married for 14 years and are parents to three children. Both balance public duties with family privacy, adapting their roles as they age and as their children grow.
Common questions about their ages
- Are Prince William and Kate the same age? Yes, both were born in 1982 and are 43 in 2025.
- Who is older, William or Kate? They are the same age; no meaningful age gap exists.
- When did they turn 30? William turned 30 in June 2012; Kate turned 30 in January 2012.
- How old were they at their wedding? Both were 29 at their wedding in April 2011.
- Do their ages affect royal duties? Age does not dictate duties; roles are defined by position, experience, and family responsibilities.
Age in perspective: long-form context
Age is a simple number but gains meaning through events and responsibilities. For royal family members, public age tracking intersects with constitutional milestones, ceremonial duties, and personal life stages. William and Kate’s parallel timelines highlight continuity: similar generational experiences, comparable career phases, and shared parenthood journey. Their sustained public roles over more than a decade demonstrate how age relates to stability, evolving duties, and long-term public service rather than any single birthday.