Following the birth of their son, the official palace statement read: "Her Royal Highness Princess Eugenie was safely delivered of a son today, 9th February 2021, at 0855hrs at The Portland Hospital. Jack Brooksbank was present. The baby weighs 8lbs 1oz.
"This is Princess Eugenie and Jack Brooksbank’s first child, The Duke of York and Sarah, Duchess of York’s first grandchild, and the ninth great-grandchild for The Queen and The Duke of Edinburgh. Her Royal Highness and her child are both doing well."
But how much do you actually know about Eugenie's tequila brand manager husband? We took a closer look at Jack's life...
How did they meet?
The pair first met while skiing at the royal hotspot Verbier in Switzerland back in 2010, and were introduced by mutual friends. They returned to the resort for a ski holiday with his future father-in-law, Prince Andrew, in January 2015.
Jack gets along with Eugenie's parents very well, and Sarah Ferguson Instagrammed a snap of them both following their announcement, and wrote: "Total joy. They float with laughter and love... Although a boat helps! I always say that the river flows well to it's destiny because of the guidance of a solid rock."
The pair announced their engagement on Monday
What does he do?
Jack is a Brand Ambassador of Casamigos tequila, which was founded by George Clooney, and worked in bars and pubs, including the celebrity hotspot Mahiki, for several years.
Speaking about his career in hospitality, he once told the Daily Mail: "I want to create a chain of pubs. It has been my dream since I was 18. I have fond memories of Sunday roasts in pubs with log fires, and it's something I want to recreate."
The pair met while skiing in Verbier
Who are his family?
Jack's parents are Nicola and George, who work as a company director and a chartered accountant respectively. He is also a descendant of the Brooksbank baronets, and he and Eugenie are actually blood relatives (albeit very, very distant).
The Duchess of York is the great great granddaughter of Lady Julia Coke, who is the daughter of Jack's great great grandfather, Thomas Coke.
In Feburary 2021 Jack and Eugenie welcomed their first child together, a son named August Philip Hawke Brooksbank. August's middle name pays a sweet tribute to the late Duke of Edinburgh, who passed away a few months after his birth on 9 April 2021.
Jack is a brand ambassador
His relationship with the royal family
Jack has been seen attending high-profile events, including Royal Ascot, with Princess Eugenie since 2011. The club manager also reportedly gets on very well with the Duke and Duchess of York, with one insider saying that the pair are "very fond" of the "lovely chap".
Jack and Eugenie visited the Queen in Balmoral together for Prince Harry's 32nd birthday in 2016, sparking rumours that they had asked Her Majesty for her marriage blessing.
Eugenie and Jack's Wedding
The couple married at St George's Chapel in Windsor, with around 800 guests in attendance.
The couple's 2018 engagement was announced in a statement that read: "The Duke and Duchess of York are delighted to announce the engagement of Princess Eugenie to Mr. Jack Brooksbank. Her Royal Highness and Mr. Brooksbank became engaged in Nicaragua earlier this month. The wedding will take place in the Autumn of 2018 at St George's Chapel in Windsor."
Speaking about the happy news, Jack's parents, Nicola and George Brooksbank, said: "We could not be more delighted with the news of the engagement. We are completely over the moon and are very excited for them both."
She said: "The lake was so beautiful, it was a special light and I even said 'this is an incredible moment' and then he popped the question, which was really surprising even though we had been together seven years. It was the perfect moment because we knew it was going to end up this way." She added "I was over the moon, crying."