The duke is expected to provide a reading at the event, which marks a decade since the inaugural Invictus Games in London in 2014.
The games were founded as a sporting event for injured and sick military personnel and veterans.
Actor Damian Lewis is set to recite the Invictus poem during the service.
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Representatives from across the Invictus Games participating nations, including members of the wounded, injured and sick service personnel and veteran community, will also be in attendance.