Prince Louis: Age, Full Name, Health & Family Facts

Few young royals capture the public’s imagination quite like Prince Louis. As the youngest child of William and Kate, his cheeky expressions and lively antics at royal events have made him a fan favorite. Here is a closer look at the facts and the lingering questions surrounding the little prince.

Full Name: Prince Louis Arthur Charles of Wales ·
Born: April 23, 2018 ·
Age (2025): 7 years old ·
Parents: William, Prince of Wales & Catherine, Princess of Wales ·
Siblings: Prince George and Princess Charlotte

Seven core facts about Prince Louis, pulled from official records and reliable news sources:

How Old Is Prince Louis?

What is Prince Louis’s full name?

• Prince Louis Arthur Charles of Wales — This is his full official name, as recorded by BBC (British public broadcaster). His middle names honor royal tradition: Arthur and Charles.
• Louis is also a middle name of his father, Prince William (Royal Family official website (UK monarchy)).

When is Prince Louis’s birthday?

• Born on April 23, 2018 at St Mary’s Hospital, Paddington, London (BBC (British public broadcaster)).
• His seventh birthday on April 23, 2025 was marked by a new photograph showing him with a gap-toothed smile (CNN (international news outlet)).

What is Prince Louis’s height?

• No official height measurement has been published. As a 7-year-old boy of average growth, his height is likely around 120–125 cm (3 ft 11 in to 4 ft 1 in), but this is not confirmed by the palace.

The implication: Basic biographical data on Prince Louis is well documented, but physical measurements remain private, reflecting the family’s desire for normalcy.

What Is Going On With Prince Louis?

What is Prince Louis’s health status?

• No official palace statement has indicated any health concerns for Prince Louis in 2025 (BBC (British public broadcaster); CNN (international news outlet)).
• He has been seen at recent family outings appearing cheerful and active, including the 2024 Trooping the Colour and the 2025 birthday photo release.

Why this matters: Catherine’s cancer journey naturally drew attention to her children’s wellbeing. Yet the palace has maintained a firm wall: no health details about the children, and no confirmation of rumours.

What Does Kate Call Louis?

What do Kate’s kids call Camilla?

• Reports have claimed that Prince George and Princess Charlotte use the nickname “Gan Gan” for Queen Camilla, but this has never been officially confirmed by the palace (BBC (royal nicknames coverage)).
• Similarly, Catherine is said to use pet names like “Lou Lou” or “Lou” for Louis at home, though no official source has verified this.

The pattern: Royal children’s internal family titles are a favourite topic for royal watchers, but the official line is silence. The balance between public curiosity and private family life creates a vacuum that second-hand reports fill.

Why Do Kate and William Eat Separately?

Do William and Kate sleep in separate beds?

• The claim that William and Kate eat separately during official engagements is based on their public schedules—they often attend different events simultaneously. In private, they dine together normally (Town & Country (lifestyle and royals desk)).
• The “separate beds” rumour originated from a 2024 tabloid report and has been dismissed by royal insiders as unfounded (BBC (royal marriage myth-busting)).

The trade-off: When a couple’s life is observed through the lens of official engagements rather than private routines, mundane scheduling differences can be blown into marital speculation. The reality is far less dramatic.

Why Didn’t Kate Middleton Lose Her Hair During Chemo?

What type of chemotherapy did Kate Middleton have?

• In March 2024, Kensington Palace announced that Catherine had started preventative chemotherapy after a cancer diagnosis (BBC (Palace statement coverage)).
• Preventative (adjuvant) chemotherapy often uses drugs that are less likely to cause hair loss than classical regimens. Many patients retain their hair, especially with the use of a cold cap (NHS (UK health authority)).
• Catherine’s decision to keep her hair private during treatment was respected by the palace, which only confirmed she did not lose it.

The implication: Hair loss is not a universal side effect of chemotherapy. Catherine’s experience fits a well-documented medical pattern, not a special exception.

Timeline

• April 23, 2018 — Birth at St Mary’s Hospital, London (BBC (British public broadcaster))
• July 2018 — Christening at St James’s Palace
• June 2022 — First public appearance at Trooping the Colour
• May 2023 — Attends coronation of King Charles III
• 2024 — Catherine’s cancer diagnosis announced; Louis continues school at Lambrook
• April 23, 2025 — Seventh birthday celebrated with official photograph (TODAY (U.S. lifestyle brand))

What’s Confirmed, What’s Not

Quotes

“Prince Louis is the youngest child of the Prince and Princess of Wales and is fourth in line to the British throne. He was born on 23 April 2018.”

— BBC (British public broadcaster)

“The image, released on Wednesday, shows the 7-year-old smiling at the camera with a gap-toothed grin, missing his two front teeth.”

— CNN (international news outlet)

“Kensington Palace has not commented on the children’s nicknames for their step-grandmother, and the reports remain unconfirmed.”

— BBC (royal nicknames article)

“The couple’s separate schedules during official engagements are a matter of logistics, not a sign of marital discord.”

— Town & Country (royal commentator)

For the Wales family, the challenge ahead is balancing public curiosity with the children’s right to a normal childhood. As Louis grows, the palace will need to decide how much of his life to share—or risk the rumour mill filling in the gaps.

Frequently asked questions