It's expected that the former actress will receive an honour in time, as her husband Prince Harry served in the British Armed Forced for 10 years.
Wickstead, who is already a firm design favourite of Kate Middleton, made headlines in May this year after openly criticising Markle'sGivenchywedding gown and accusing the designer, Clare Waight Keller, of copying her.
The Prince sported a crisp navy suit with an azure tie to represent Ireland's Presidential colours, while the fashion-conscious Duchess wore a grey Roland Mouret taupe dress and a pair of black heels.
Meghan's carefully refined style ― which is seemingly getting chicer with each appearance ― ensured that royal fans in Ireland got a glimpse of designer labels, tailored dresses and fun accessories.
Arriving in Dublin on Tuesday, the Duke and Duchess of Sussex will embark on a two day Ireland visit, where they'll immerse themselves in the culture and history of Dublin, especially local sports, the arts and entrepreneurship.
A boy strokes Prince Harry's beard, as Meghan, the Duchess of Sussex, smiles on the pitch at Croke Park on July 11, 2018.
RSVP, one of Ireland's most popular celebrity magazines, ran a live blog of the visit on Tuesday which was also the top story on the website of the Irish Independent, the country's highest selling daily newspaper.
Upon their arrival, Markle and her prince were greeted by the Taoiseach (or prime minister) of Ireland, Leo Varadkar.