The 35-year-old actress opted for a simple, classy ensemble, consisting of a sleeveless navy Antonia Berardi dress, round-framed sunglasses and black Aquazurra wedges.
Markle was treated to the best seat in the house, standing and clapping in the royal box at the Coworth Park Polo Club, as her 32-year-old beau competed in the polo game to support two of his charities, Sentebale and WellChild.
Though technically separated by the playing field, this outing marked the first time Prince Harry and Markle have attended a public event together as a couple. The adorable duo also attended the wedding of one of the royal's close pals in Jamaica in March, but the nuptials were kept private.
Markle is also expected to attend a portion of Pippa Middleton and James Matthews' wedding later this month as Harry's plus one. Protocol prohibits unmarried and un-engaged partners to attend the nuptials, but Markle is reportedly attending the party that evening.