Royals Prince George and Princess Charlotte to Be Page Boy and Bridesmaid in Their Teacher's Wedding to Prince William's BFF William is said to be usher, while his kids are expected to revive their favorite wedding roles! By Morgan M. Evans Morgan M. Evans Morgan M. Evans is a former AM news editor at PEOPLE. She left PEOPLE in 2021. People Editorial Guidelines Published on June 24, 2019 03:16PM EDT Prince William and his eldest children, Prince George and Princess Charlotte, are getting ready for another wedding. On Sunday it was announced that Thomas van Straubenzee, the Duke of Cambridge’s lifelong friend, is tying the knot. According to the Sunday Times, the godfather to 4-year-old Charlotte proposed to Lucy Lanigan-O’Keeffe, an assistant head teacher at Thomas’ Battersea School in London, where George, who turns 6 on July 22, is currently enrolled. Charlotte will start at the prestigious school in September. William will take part in van Straubenzee’s wedding festivities and serve as usher for the ceremony, while George and Charlotte are expected to join the wedding party as pageboy and bridesmaid, the outlet reports. Princess Charlotte and Prince George at Princess Eugenie and Jack Brooksbank’s wedding. Max Mumby/Getty Prince William and Thomas van Straubenzee. Max Mumby/Indigo/Getty Prince William’s Sweetest Royal Dad Photos with Prince George, Princess Charlotte and Prince Louis Van Straubenzee and his younger brother, Charlie, 31, are extremely close to the royal family. The brothers attended Berkshire’s Ludgrove School with William and Harry, along with their late brother, Henry, who died in a car crash at the age of 18. After Henry’s sudden death, the Henry van Straubenzee Memorial Fund was set up in his honor. The charity, which was created by his parents, supports schools in Uganda and is the only charity for which William and Harry are joint patrons. Both van Straubenzee brothers served as ushers in Prince Harry and Meghan Markle’s royal wedding at Windsor Castle last May. It was reported that Charlie even gave a speech at the reception, while Thomas also spoke at William and Kate’s royal Westminster Abbey wedding in 2011. Following their May wedding, Harry and Meghan attended Charlie’s wedding to Daisy Jenks in Surrey. The outing was the pair’s first public event since becoming husband and wife and also fell on Meghan’s 37th birthday. The Duke of Sussex served as usher for his friend’s big day. Mark Stewart Photography Ltd Meghan Markle and Prince Harry Hold Hands at Romantic Wedding on Her 37th Birthday The Times also reports that Charlie, who shares his own bond with Prince Harry is in the mix to be named one of Baby Archie‘s godparents. Can’t get enough of PEOPLE’s Royals coverage? Sign up for our newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! And similar to Meghan, who was married once before prior to her relationship with Harry, van Straubenzee’s upcoming nuptials will not be his first. The 36-year-old was previously married to Lady Melissa Percy, a daughter of the Duke of Northumberland, in 2013. They couple were married for 3 years before divorcing in 2016. According to the Times, Lanigan-O’Keeffe is the daughter of Carolyn and Stephen Lanigan-O’Keeffe. Her father is a lawyer and her brother, Arthur, is an Olympic pentathlete.