Martin - who was Meghan’s makeup artist for her wedding to Prince Harry - took to Instagram to share a snap of a plate of cupcakes.
“I am so overwhelmed by all of your well wishes! My sincerest gratitude! Thanks to everyone for reaching out to me today and Meg, love you friend for surprising me on my special day,” read the caption.
The former Suits actress left husband Prince Harry and son Archie Harrrison at home for the whirlwind two day trip.
The 38-year-old is believed to have flown commercial following backlash over her use of private jets.
WATCH: Meghan Markle shares emotional ‘surprise’ video