The Duchess of Sussex was keen to get back to baby Archie as she left the launch of her new collection of workwear in aid of a women's charity.
Meghan told those at the event on Oxford Street that she could not stay longer as she had to "get back to the baby," adding "it's feed time."
The Duchess' high street range - the Smart Set Capsule - was created with the help of Jigsaw, John Lewis & Partners, Marks & Spencer and her designer friend Misha Nonoo, who "pioneered the capsule wardrobe".
One item from the stock - the tote bag from John Lewis & Partners - has already sold out online.
She laughed as she told guests from the retailers involved in the project that she was told the good news in the car before she arrived adding: "So that's great."
For every one of the five items sold, one will be donated to Smart Works, a charity that provides training and interview clothes to unemployed women in need in a bid to help them into work.
Video report by ITV News Royal Editor Chris Ship
Meghan's collection will be available for two weeks, and will include a blazer and trousers, a tote bag, a dress and a white blouse - all classic items for women's' workwear.
Each item's description on their respective websites ends with a sign-off from the Duchess: “Not a handout, a hand held” - HRH The Duchess of Sussex, Patron of Smart Works
In a statement, The Duchess of Sussex said: “Since moving to the UK, it has been deeply important to me to meet with communities and organisations on the ground doing meaningful work and to try to do whatever I can to help them amplify their impact.
"It was just last September that we launched the ‘Together’ cookbook with the women of the Hubb Kitchen in Grenfell.
"Now, one year later, I am excited to celebrate the launch of another initiative of women supporting women, and communities working together for the greater good.
"When you buy any item in the Smart Set Capsule Collection for Smart Works, the same item will be given to a Smart Works client, and with it, the confidence and support she needs to enter the workforce and take an important step in building a career.
"Thank you to the four brands who came together in supporting Smart Works on this special project - placing purpose over profit and community over competition.
"In convening several companies rather than one, we’ve demonstrated how we can work collectively to empower each other - another layer to this communal success story, that I am so proud to be a part of.”
At the official launch of the Smart Set Capsule collection on Oxford Street's John Lewis, Meghan explained the inspiration behind the fashion line.
"On my visits to Smart Works, one of the things I realised was there was a little bit of a challenge in terms of styling for the women, because we had lot of donations, but not necessarily the things that women needed to have," she said.
"The next time I went, there was a rack of about 40 or 50 lilac-coloured blazers.
"I'm sure for someone, it's exactly what she wants to be wearing, but for most women, when you're going in there and you want to have a job interview, and you want to feel your very best and you want to feel confident, you want to be wearing the pieces of clothing that make you feel that way - not the leftovers that didn't sell from the end of the season."
So what's in Smart Set Capsule collection?
The capsule collection features a blazer and trousers from Jigsaw, a tote bag by John Lewis & Partners, a dress from Marks & Spencer, and the white blouse by Misha Nonoo.
The blazer and trousers, Jigsaw’s Paris tailoring collection, are two of the brand’s most popular pieces, costing £199 and £120 respectively.
To go with Jigsaw's piece, Misha Ninoo created what has been described as the “perfect crisp white shirt”, costing £125.
John Lewis is selling the leather tote for £109, which is “a lightweight, versatile and practical weekday accessory for the modern woman”.
The shift dress by M&S costs £19.50, making it the most affordable of the pieces, and is available in vibrant blue or classic black, and in regular and petite sizes
Described as an autumn staple, it's “cut from crepe that handily doesn’t require ironing, the shift shape flatters your figure with its clean and simple lines”.
Kate, a woman who was recently helped back into employment, due to the help of Smart Works, said: “My outfit made me feel like a boss – powerful and strong.
"It just made me feel amazing; reminding me of how far I have come and the future I have in front of me.”
Juliet Hughes-Hallett, Chair and Founder of Smart Works, said the charity is celebrating its sixth year of running, as well as "its 15,000th client – its 15,000th moment of helping a woman back into the workplace.
"We have dressed and trained every woman as if she was the only one and made each and every client feel exceptional.
"The Smart Set capsule collection will make a significant difference in our ability to dress our clients in the high-quality clothes and accessories they need, giving her the opportunity regain her confidence, look fabulous and get the job.”
The Duchess announced the project during her guest editorship of British Vogue in September.
Writing in the fashion bible she said: “The reason I was drawn to Smart Works is that it re-frames the idea of charity as community, which, for me, is incredibly important: it’s a network of women supporting and empowering other women in their professional pursuits.”
Meghan previously made private visits to the charity, before officially becoming its royal patron in January.