The Duke and Duchess of Sussex will both attend the Endeavour Fund Awards in London this evening, as part of the couple's last round of duties as senior royals.
The annual ceremony marks the achievements of wounded servicemen and women who have participated in physical challenges to aid in their recovery.
The couple will also attend the Mountbatten Festival of Music on Saturday, with the Duke appearing as Captain General Royal Marines for the final time at the Royal Albert Hall event.
Harry's military appointments are being put on hold as part of the agreement for the Sussexes to step back from royal life.
He took over from the Duke of Edinburgh as Captain General Royal Marines in 2017 and will retain his ranks of Major, Lieutenant Commander and Squadron Leader across the tri-services.
Next week, the pair will join the Queen, the Prince of Wales, the Duchess of Cornwall and the Duke and Duchess of Cambridge at the annual Commonwealth Day service at Westminster Abbey.
Harry spent 10 years in the forces and served on the frontline in Afghanistan.
It is expected to be the couple’s final official engagement before they quit royal life.
In January, Harry and Meghan announced they wanted to step back from senior duties into a dual role, supporting the Queen and earning their own money.
However, it was decided this would not be possible, with the couple agreeing to no longer use the title of HRH and stop carrying out royal duties.
A spokeswoman for Harry said: "The duke remains dedicated to supporting the military and mental health causes through his wider private work."
The couple will officially step back from being working members of the Royal Family on 31 March, no longer using their HRH titles, with the arrangement being reviewed after 12 months.
The family, with Meghan and baby Archie, will divide their time between North America and Britain.
Cover image: PA.