Prince Harry and Meghan Markle welcomed their first baby into the world on May 6, and the family made their first appearance as a trio two days later when they announced their son's name- Archie Harrison Mountbatten-Windsor.
While there has been speculation surrounding baby Sussex's name; with some thinking Archie is an acronym of Meghan's real name Rachel, others believe Harrison means Harry's son - clever, right?
However, there is another reason behind the Duke and Duchess' son's moniker - and it is a lot more sentimental than you first thought.
It is believed the royal couple named their child after an officer who saved Prince Harry's military career.
Harry, 34, served in the army with Major Tom Archer-Burton, and he was nicknamed Archie.
Harry credits Archie for saving his career especially when he was told he couldn't fight in Iraq in 2007. Archie managed to convince the Queen's grandson to stay in the armed forces and helped to keep the news Harry was deployed in the battle zone out of the public eye, which Harry is forever grateful for.
The duo still remain close friends, with Archie making an appearance at his and Meghan's royal wedding in May last year.
A source told The Sun: 'It’s well known in Army circles, and Archie’s inner circle, that baby Archie is a nod to him. The two men have stayed in regular contact, and Archie has met most of Harry’s family including Meghan.'
However, a 'modest' Archie won't take credit for the royal baby's name.
The insider added: 'It’s an incredible honour but Archie is an incredibly modest chap, and won’t be making a big deal of it.
But it is a BIG DEAL!
All Of The Royal Baby Hospital Photos - Grazia
Prince Louis was delivered on the 23rd of April 2018 in the Lindo Wing, St Mary's Hospital.
The Duke and Duchess of Cambridge were photographed with Princess Charlotte for the first time outside of the Lindo Wing on the 2nd of May, 2015.
Prince George was born on the 22nd of July, 2013 in the Lindo Wing of St Mary's Hospital.
Prince Harry was photographed for the first time shortly after his birth on the 15th of September 1984.
On the 21st of June, 1982 Prince William was born. This was one of the first pictures of the future Monarch taken with his mother, Diana Princess of Wales and father, Prince Charles.
On the 23rd of March 1990 Princess Eugenie was born in Portland Hospital, London.
Zara Phillips, the daughter of Princess Anne was born on the 15th of May 1981 in the Lindo Wing, St Mary's Hospital.
Princess Beatrice was born on the 8th of August 1988 in Portland Hospital, London.
On the 15th of November 1977 Peter Phillips, the son of Princess Anne, was born in the Lindo Wing, St Mary's hospital.