The Daily Mail's royals reporter Rebecca English confirmed Markle's appearance at the annual event, marie claire reports, with sources also speaking to Hello!.
According to royal household staff, Markle chose a 'festive red dress' for the occasion. And judging by all the post-party talk, she caused quite a stir.
'Harry and Meghan spent about an hour at the party and they were really friendly and went around talking to everyone,' a guest told Hello!. 'Meghan was very sweet and so beautiful.'
This article originally appeared on marie claire.