Meghan Markle created a "pop-up baby boutique" just days after the christening of daughter Princess Lilibet on a surprise outing.
It has been confirmed that she and members of her and Prince Harry's Archewell Foundation marked International Women's Day by setting up the pop-up in collaboration with the charity Harvest Home.
The charity helps expectant mothers who face issues such as domestic violence, substance use and homelessness, providing them with housing and well-being support.
And in a statement on the Archewell website, it says that Meghan helped the charity to celebrate International Women's Day.
It said: "As an advocate for women’s rights and supporter of mothers and families in need, Meghan, The Duchess of Sussex and the Archewell team celebrated the women of Harvest Home by creating a pop up baby boutique, hosting lunch from a female owned restaurant, and making a donation to the organization.
"Happy International Women’s day to all of you! Whether donating your time, funds, or helping a woman in your community, let’s all celebrate the women in our lives today and every day!"
Meghan marking International Women's Day comes just days after daughter Lilibet was christened at their home in California - but it seems royals snubbed the event.
The one-year-old is said to have been christened last Friday, with around 20 to 30 people in attendance for the celebration.
Among those at the intimate gathering were said to be Meghan's mother Doria Ragland, Lilibet's godfather Tyler Perry and an unnamed godmother.
A spokesperson for Harry and Meghan said: "I can confirm that Princess Lilibet Diana was christened on Friday, March 3 by the Archbishop of Los Angeles, the Rev John Taylor."
It is the first time Lili has been publicly referred to as Princess. She became entitled to become a princess when her grandfather King Charles acceded to the throne.
The rules set out by King George V in 1917 mean Harry and Meghan's older son Archie and Lili, as the children of a son of a sovereign, are automatically a prince and a princess and also now have an HRH style if they choose to use it.
However, it is understood Lili's title of princess and Archie's title as a prince will be used in formal settings, but not in everyday conversational use by the couple. This has yet to be updated on the royal family website, with the children still referred to as miss and master.
Harry and Meghan are understood to be keen to not deny their children their birth-right, but to allow them the chance to decide for themselves when older whether to drop or keep using the titles.
Buckingham Palace said the royal website "will now be updated in due course" to reflect the titles.
A royal source confirmed the King was notified of Harry and Meghan’s intention to use the titles for their children, adding: "The appropriate conversations have taken place ahead of today’s news (of Lilibet’s christening)."
Meanwhile, a source told PEOPLE magazine that Meghan, 41, and Harry, 38, extended an invite to Charles, Queen Camilla and the Prince and Princess of Wales - but they were not in attendance for the ceremony.