During her visit, the Duchess - who has been named patron of the National Theatre - will join and watch a workshop with members of the Pericles company, which was the National Theatre's first Public Acts production in 2018.
Another shared: "I predict that Henry Charles Albert David will practically be carrying his wife and watching every step her feet make in this snow". "It was the most incredible idea - this small gesture".
And the 37-year-old thanked royal fans for waiting to greet them, saying: "Thank you for waiting so long to say hi, our train was a little bit delayed but we tried our best to get here fast".
She helped the women of the Hubb Community Kitchen, whose lives were affected by the Grenfell Tower fire, to compile a charity cookbook to help with funding.
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Meghan is no stranger to cold weather, having lived in Toronto while she filmed the hit legal drama "Suits." "I was a service user, and One25 was there for me when I had no-one".
Markle and McPhee both originate from Southern California and have spoken openly about how their childhood experiences doing theatre shaped them. They loved when I did not love myself.
- Here's a moment of cuteness in Scotland during a visit from the Royals Tuesday.
Ms Smith said: "They understood the need for blankets, hot water bottles and the tender care that we give out on the van and that tonight will be a very hard night for the women". "Ballerina Ocean, I think you are going to be everyone's favorite person of the day".
It is the theatre that first announced this morning they are still expecting the Duke and Duchess to visit despite the heavy snow.