The Duchess' patronage of the NT is one of four she has taken on, alongside the Association of Commonwealth Universities - in which she also succeeds the Queen as patron - women's charity Smart Works and animal welfare charity Mayhew.
The former Suits star began her day at Smart Works, a United Kingdom charity that helps unemployed women regain the confidence they need to return to the workforce.
In the months leading up to the holidays, after revealing that she and husband Prince Harry are expecting their first child together this spring, Meghan was dogged by countless reports of being hard behind the scenes and an alleged feud between her and sister-in-law, Kate Middleton.
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In Feb. 2012, Kate made her first patronage visit to the National Portrait Gallery for a private viewing of the works of artist Lucian Freud.
A day after The National Theatre's online gaffe Kensington Palace officially confirmed the Duchess of Sussex would be supporting the arts group alongside three other organisations. Meanwhile, it's no surprise that Meghan, a vocal feminist, chose an organization focused on helping women regain the skills and confidence to find jobs after unemployment.
"Absolutely I think our wedding will bring the family closer together".
In the past, Markle has worked with World Vision where she was global ambassador from 2016 to 2017.
Once an outspoken feminist who gave speeches at United Nations forums, Meghan has since shut down her social media accounts as part of her transition from actress to duchess.