According to the outlet, the royal family began the London festivities with a service at Westminster Abbey followed by a parade "of up to 1,300 serving personnel" and a commemorative flypast over the palace.
This evening, Prince Harry will accompany his American bride to a summer party at the British Ambassador's residence, with the guestlist including members of the Irish arts, sporting, military and social enterprise communities.
Then the couple will have a whole day of activities in Dublin on Wednesday, including a trip to Trinity College, to see the Book of Kells, considered one of Ireland's greatest cultural treasures.
Meghan and Harry are officially in Ireland.
Even before leaving for Ireland, it has been a busy week for the newlyweds.
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Not everyone would wear olive green to a christening, but Meghan Markle managed to pull it off easily.
The couple looked loved up a day previous on Monday, when they attended a fly-past marking the centenary of the British Royal Air Force.
Prince Louis' grandparents on both sides, Carole and Michael Middleton and the Duke and Duchess of Cornwall, all beamed with pride as they arrived at St James' Palace.
Keeping the rest of her look very simple, Meghan added diamond and gold Cartier stud earrings, which were on show with her brunette hair pulled back in a low bun.
The Archbishop of Canterbury, Justin Welby, who officiated their royal wedding on May 19, also presided over the christening.