And following the emotional ceremony, the Sussex Royal Instagram account posted a heartfelt update.
Saturday's event marks 75 years since notable battles of 1944, including Monte Cassino, Kohima and Imphal, D-Day and the collaboration of Commonwealth and Allied forces. Together with their wives, the princes, who have both served their country in the past, enjoyed a night of moving music and poignant tributes on the eve of Remembrance Sunday.
The event, held to commemorate Britain's war dead, is held annually in the Royal Albert Hall.
Each royal accessorized with a red poppy pin - an artificial flower that has been used to honor fallen veterans since 1921.
Tomorrow the royals will pay their respects at the Cenotaph where Prince Charles will lay the wreath on behalf of Queen Elizabeth who passed on the duty to her son three years ago after she turned 90.
The event is organised by the Royal British Legion, which provides assistance to United Kingdom military veterans and their families.
The royals and baby Archie in South Africa earlier this year.
However much they may love parenthood, Harry and Meghan don't want a castle full of kids and plan to have two, maximum - but a second baby announcement may be closer than anyone expects.
However Harry was keen to emphasis he and William remain very fond of each other.
He said: 'We are brothers. "As brothers, we have good days and we have bad days".
He admitted: "We're certainly on different paths at the moment, I'll always be there for him and as I know, he'll always be there for me".