Prince William's friend to marry a teacher at Prince George's school

Prince William's pal is getting ready to tie the knot!

One of the Duke of Cambridge's best friends, Thomas van Straubenzee, is set to make things official with his now-fiancee, Lucy Lanigan-O’Keeffe, The Sunday Times reports. The pair reportedly got engaged last week and, aside from Thomas' friendship with William, they have another royal connection -- Prince George!

The 5-year-old son of William and Kate Middleton attends the Thomas London Day School Battersea's location where Lucy serves as an assistant head teacher and leads classes on outdoor learning and mindfulness, according to the outlet. 

The U.K. paper reports that both George and Princess Charlotte, 4, will likely serve as a pageboy and bridesmaid in the upcoming nuptials, while William is expected to be an usher for Thomas' big day.

21 PHOTOS
Prince George out and about
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Prince George out and about
WINDSOR, UNITED KINGDOM - OCTOBER 12: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Princess Charlotte of Cambridge and Prince George of Cambridge attend the wedding of Princess Eugenie of York and Jack Brooksbank at St George's Chapel on October 12, 2018 in Windsor, England. (Photo by Pool/Max Mumby/Getty Images)
WINDSOR, ENGLAND - OCTOBER 12: Bridesmaid Theodora Williams, pageboy Prince Georeg of Cambridge and Savannah Phillips attend the wedding of Princess Eugenie of York and Jack Brooksbank at St George's Chapel in Windsor Castle on October 12, 2018 in Windsor, England. (Photo by Pool/Samir Hussein/WireImage)
Britain's Prince George of Cambridge reacts as he arrives with other brisdemaids to attend the wedding of Britain's Princess Eugenie of York to Jack Brooksbank at St George's Chapel, Windsor Castle, in Windsor, on October 12, 2018. (Photo by Yui Mok / POOL / AFP) (Photo credit should read YUI MOK/AFP/Getty Images)
The bridesmaids and page boys, including Prince George of Cambridge (C) and Princess Charlotte of Cambridge (3L), stand with Sarah, Duchess of York (L), Britain's Princess Beatrice of York (2L) as they wave off Britain's Princess Eugenie of York and her husband Jack Brooksbank from the West Steps of St George's Chapel, Windsor Castle, in Windsor, on October 12, 2018 after their wedding ceremony. (Photo by TOBY MELVILLE / POOL / AFP) (Photo credit should read TOBY MELVILLE/AFP/Getty Images)
Britain's Princess Charlotte of Cambridge and Britain's Prince George of Cambridge hold hands with their father, Britain's Prince William, Duke of Cambridge, as Britain's Prince Louis of Cambridge is carried by his mother, Britain's Catherine, Duchess of Cambridge after his christening service at the Chapel Royal, St James's Palace, London on July 9, 2018. (Photo by Dominic Lipinski / POOL / AFP) (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)
WINDSOR, UNITED KINGDOM - MAY 19: Prince George of Cambridge, Jasper Dyer, Princess Charlotte of Cambridge, Catherine, Duchess of Cambridge, Jessica Mulroney, Ivy Mulroney and Florence van Cutsem arrive at the wedding of Prince Harry and Ms. Meghan Markle at St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Jane Barlow - WPA Pool/Getty Images)
LONDON, ENGLAND - JUNE 09: Prince Harry, Duke of Sussex, Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Princess Charlotte of Cambridge, Savannah Phillips and Prince George of Cambridge on the balcony of Buckingham Palaceduring Trooping The Colour 2018 at The Mall on June 9, 2018 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, even though the Queen's actual birthday is on April 21st. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JUNE 09: Princess Charlotte of Cambridge, Savannah Phillips, Prince George of Cambridge and Isla Phillips watch the flypast on the balcony of Buckingham Palace during Trooping The Colour on June 9, 2018 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, even though the Queen's actual birthday is on April 21st. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - JUNE 09: Princess Charlotte of Cambridge, Savannah Phillips, Prince George of Cambridge and Isla Phillips stand on the balcony of Buckingham Palace during the Trooping the Colour parade on June 9, 2018 in London, England. (Photo by James Devaney/FilmMagic)
LONDON, UNITED KINGDOM - JUNE 09: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge and Isla Phillips stand on the balcony of Buckingham Palace during Trooping The Colour 2018 on June 9, 2018 in London, England. The annual ceremony, involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, even though the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - JUNE 09: Prince George of Cambridge during Trooping The Colour 2018 on June 9, 2018 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
GLOUCESTER, ENGLAND - JUNE 10: Prince George of Cambridge attends the Maserati Royal Charity Polo Trophy at Beaufort Park on June 10, 2018 in Gloucester, England. (Photo by Samir Hussein/WireImage)
GLOUCESTER, ENGLAND - JUNE 10: Catherine, Duchess of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge attend the Maserati Royal Charity Polo Trophy at Beaufort Park on June 10, 2018 in Gloucester, England. (Photo by Samir Hussein/WireImage)
GLOUCESTER, ENGLAND - JUNE 10: Catherine, Duchess of Cambridge looks on as Prince George of Cambridge holds a toy gun the Maserati Royal Charity Polo Trophy at Beaufort Park on June 10, 2018 in Gloucester, England. (Photo by Samir Hussein/WireImage)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Savannah Phillips, Princess Charlotte of Cambridge and Prince George of Cambridge attend the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge plays with a Slinky toy as he attends the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge swings a polo mallet as he attends the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge attends the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge comforts Prince George of Cambridge as they attend the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge attends the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on June 10, 2018 in Gloucester, England. (Photo by Max Mumby/Indigo/Getty Images)
GLOUCESTER, ENGLAND - JUNE 10: Savannah Phillips, Princess Charlotte of Cambridge, Prince George of Cambridge and Catherine, Duchess of Cambridge during the Maserati Royal Charity Polo Trophy at Beaufort Park on June 10, 2018 in Gloucester, England. (Photo by Antony Jones/Getty Images)
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Thomas' friendship with William is a long one, with the duo having met at Ludgrove School when they were kids. Thomas has since attended both William's 2011 wedding and Prince Harry's nuptials to Meghan Markle last year. Additionally, the real estate agent serves as Charlotte's godfather.

Thomas was previously married to Lady Melissa Percy, a British fashion designer, from 2013 to 2016.

Thomas van Straubenzee and Prince William

Thomas van Straubenzee and Prince William in 2014

Max Mumby/Indigo/Getty Images

Charlotte is set to attend the same school as her older brother, which he began attending back in 2017, beginning this fall.

"We are delighted that The Duke and Duchess of Cambridge have decided that Princess Charlotte will join her elder brother, Prince George, at Thomas’s Battersea," Simon O’Malley, Headmaster at Thomas’s Battersea, said in a statement. "We greatly look forward to welcoming her and all of our new pupils to the school in September."

RELATED: Prince George and his school teacher who went viral:

12 PHOTOS
Prince George with his school teacher Helen Haslem
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Prince George with his school teacher Helen Haslem
Britain's Prince George (C) accompanied by Britain's Prince William (L), Duke of Cambridge arrives for his first day of school at Thomas's school where he is met by Helen Haslem (R) head of the lower school on September 7, 2017 in southwest London. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: A general view of St. Thomas's school in Battersea where Prince George is attending his first day in London, United Kingdom on September 7, 2017. (Photo by Kate Green/Anadolu Agency/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: Prince George of Cambridge arrives for his first day of school with his father Prince William, Duke of Cambridge as they are met Head of the lower school Helen Haslem at Thomas's Battersea on September 7, 2017 in London, England. (Photo by Richard Pohle - WPA Pool/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: (EDITORS NOTE: Retransmission of #843614148 with alternate crop.) Prince George of Cambridge arrives for his first day of school with his father Prince William, Duke of Cambridge as they are met Head of the lower school Helen Haslem at Thomas's Battersea on September 7, 2017 in London, England. (Photo by Richard Pohle - WPA Pool/Getty Images)
Britain's Prince George (C) accompanied by Britain's Prince William (L), Duke of Cambridge arrives for his first day of school at Thomas's school where he is met by Helen Haslem (R) head of the lower school in southwest London on September 7, 2017. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: (EDITORS NOTE: Retransmission of #843616140 with alternate crop.) Prince George of Cambridge arrives for his first day of school at Thomas's Battersea on September 7, 2017 in London, England. (Photo by Richard Pohle - WPA Pool/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: (EDITORS NOTE: Retransmission of #843614132 with alternate crop.) Prince George of Cambridge arrives for his first day of school at Thomas's Battersea on September 7, 2017 in London, England. (Photo by Richard Pohle - WPA Pool/Getty Images)
Britain's Prince George (C) accompanied by Britain's Prince William (L), Duke of Cambridge arrives for his first day of school at Thomas's school where he is met by Helen Haslem (R) head of the lower school in southwest London on September 7, 2017. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP/Getty Images)
Prince George holds his father Britain's Prince William's hand as he arrives on his first day of school at Thomas's school in Battersea, London, September 7, 2017. REUTERS/Richard Pohle/Pool
LONDON, ENGLAND - SEPTEMBER 7: Duke of Cambridge, Prince William departs St Thomas's Battersea after dropping off Prince George for his first day school in London, United Kingdom on September 7, 2017. (Photo by Kate Green/Anadolu Agency/Getty Images)
Britain's Prince George (R) accompanied by Britain's Prince William (L), Duke of Cambridge arrives for his first day of school at Thomas's school in Battersea, southwest London on September 7, 2017. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP/Getty Images)
LONDON, ENGLAND - SEPTEMBER 7: A general view of St. Thomas's school in Battersea where Prince George is attending his first day in London, United Kingdom on September 7, 2017. (Photo by Kate Green/Anadolu Agency/Getty Images)
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