Hundreds of incredible images poured in following the stunning display, which was watched from the balcony by the Royal Family.
There was a huge parade along The Mall and a fly-past featuring around 100 planes.
Prince Harry paid tribute on Tuesday to Britain's complex and "at times tragic" shared history with Ireland, at the start of a two-day visit to Dublin with his wife Meghan, their first trip overseas since their wedding in May.
Wickstead addressed the commentary in an Instagram post: "Her Royal Highness, the Duchess of Sussex looked absolutely attractive on her wedding day and I have the utmost admiration and respect for her".More news: White House announces additional $200B in tariffs targeting China
"Tenacity, skill and gallantry have been your hallmarks as you helped safeguard freedom and security in many parts of the world". Later, Meghan and Harry will head to Dublin to begin their two-day whirlwind trip of Ireland.
Other female members of the royal family that donned badges included the Duchess of Cornwall, Princess Anne and Sophie, Countess of Wessex.More news: U.S. Working Closely with Thailand to Rescue Children from Cave
Even celebrities are noticing it, with actress Mindy Kaling pointing out Meghan's ability to pull off the style is actually her superpower. She also wore a tartan coat for a visit to Scotland in April 2013.
The Royals arrive at Westminster Abbey to mark 100 years of the RAF, ahead of the flypast.
The couple met RAF servicemen and women, charity representatives involved in the RAF100 Appeal, RAF Veterans and Civil Service personnel involved in the Centenary celebrations.
Following the service at Westminster, a royal flypast took place over Buckingham Palace.More news: Trump arrives in Brussels ahead of potentially contentious North Atlantic Treaty Organisation summit
On Wednesday, their day will start with an official meeting with Michael Higgins, the president of Ireland, before heading to Croke Park, where they will view an exhibit that includes artifacts from the Bloody Sunday massacre.