Prince Harry and Meghan Markle to attend first official engagements

The visit to a charity fair, to raise awareness of HIV/AIDS and youth crime, comes on World Aids Day.

It i particularly symbolic for Harry whose late mother Princess Diana is credited with playing a leading role in breaking down the stigma that was attached to the disease.

Queen Elizabeth's grandson Harry, currently fifth-in-line to the throne, and US actress Markle, best known for her leading role in US legal drama Suits, announced their engagement on Monday, igniting a trans-Atlantic media frenzy.

They are to be married next year in St George's Chapel at Windsor Castle, the family home of British kings and queens for almost 1,000 years.

WATCH: Prince Harry and Meghan speak about their relationship #RoyalWedding https://t.co/RnPAf2tcp4

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The couple will travel to Nottingham in central England to attend an event held by the Terence Higgins Trust to remember lives lost to HIV and mark the progress that has been made fighting the illness.

Harry has become a prominent campaigner on the issue, following in the footsteps of his mother who opened Britain´s first HIV/AIDS unit in London in 1987 and famously shook hands with and kissed an AIDS patient during a hospital visit.

Afterwards, they will visit Nottingham Academy to meet headteachers from local schools to hear about the Full Effect programme, an imitative supported by the charity of Harry and his elder brother Prince William and wife Kate, which looks to sway children from becoming involved in youth violence.

Markle, who has been a humanitarian campaigner for a number of causes including work as a UN women's advocate, is to give up her previous charity roles as she begins life in Britain's royal family, Harry's spokesman said on Tuesday.

She was also keen to travel around Britain to get to know the country that will become her home, the spokesman added, as she intends to become a British citizen.