Prince Harry and Meghan Markle will marry at St George’s Chapel, Windsor Castle, in May, Kensington Palace says.
The Royal Family will pay for the wedding, including the service, music, flowers and reception – the date will be announced later.
A spokesman for the prince said the pair would make sure the wedding “reflects who they are as a couple”.
Jason Knauf said Prince Harry, 33, and Ms Markle were “leading the planning process for all aspects of the wedding” and were working through ideas on how members of the public could “feel part of the celebrations”.
“This wedding, like all weddings, will be a moment of fun and joy that will reflect the characters of the bride and groom,” he added.
Mr Knauf described Windsor as a “very special place” for the couple, saying they had spent time there together since meeting in July 2016.
He also revealed that the American actress intends to become a British citizen and will work towards it in the coming years.
St George’s Chapel was the venue for a service of prayer and dedication after Harry’s father, the Prince of Wales, married the Duchess of Cornwall at the Windsor Guildhall in 2005.
It was also chosen for the wedding of Harry’s cousin, Peter Phillips, and Autumn Kelly in 2008, and the Earl and Countess of Wessex in 1999.