Prince Harry, 38, is expected to attend the opening and closing ceremonies, as well as various competitions.
The Duchess of Sussex, 42, will join her husband at the Games shortly after they begin.
So what are the Invictus Games and why are they so special to Harry? Find out everything you need to know in the video below…
Ahead of the event, Harry will return to London for the first time since June.
The Duke will attend the WellChild Awards, in association with GSK, on 7 September.
The ceremony will be streamed live on HELLO!'s homepage as we're official media partners for the event.
That means Harry will also be in the UK on the anniversary of his late grandmother Queen Elizabeth II's death on 8 September.
The King and Queen are currently residing at their Scottish home, Balmoral Castle.