The concert was called 100 Days to Peace and marked the centenary of the end of the First World War.
Britain's Duke and Duchess of Sussex, PrinceÊHarryÊand his wife Meghan, stand for the National anthem before a gala concert in support of charities for military veterans who face mental health challenges, in London, Britain September 6, 2018.
The show, presented by the Royal Armouries museum, will raise money for three charities supporting veterans with mental health issues - Help for Heroes, Combat Stress and Heads Together.
She added: "Labradors are also good with other dogs, which might be a reason Meghan chose a rescue dog - so Guy could interact with him and they could see how the two got along, before bringing him back home with them". Prince Harry wore a dapper navy suit and olive-green tie.
The Duke and Duchess of Sussex were last spotted at the WellChild Awards which celebrates the inspirational courage shown by seriously ill children across the UK.
In the intermission, they were to meet with performers and charity leaders.
Harry and Meghan visited Prince Charles's Castle of Mey in Scotland and also enjoyed an Italian getaway at the Lake Como home of George and Amal Clooney. Obviously, with a song-filled night ahead of them, Meghan and Harry dressed up a bit.
He was responsible for Harry's first tour of Afghanistan and attended the wedding of the prince and Meghan.