Onlookers cheered as the couple arrived at the station, housed inside shipping containers in the diverse south London district, a hub for Britain's African and Caribbean communities. She recently moved from Toronto, where "Suits" is filmed, to London to live with Harry.
Twitter users were swift to identify her £45 sweater as from British brand M&S's Autograph collection, which Markle teamed with Burberry pants, a coat by Smythe, and a scarf from Jigsaw.
The social media purge is likely part of Markle's transition to royal life. "I can see why your show is so popular. You're so thoughtful and your approach is so engaging". "I must tune in".
Prince Harry and Meghan Markle make their first appearance of year
Shane Carey, 46, founder and chief executive of Reprezent, said: "Since the visit was announced there's been massive excitement in the station - much more than I could have expected".
"I must tune in", said Markle, who was wearing a coat by Smythe, Burberry pants and a sweater by high street store Marks & Spencer. I think they're [a] very good match, I'm very happy for them, Meghan and Harry.
The Reprezent programme was set up ten years ago o help young people develop skills such as audio and radio production, confidence building and work experience.
St George's Hall is next to the chapel at Windsor Castle, but Frogmore was already said to be close to Meghan's heart because they had their engagement pictures taken there and she took Harry for a romantic picnic at the venue last summer.
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