Celebrations for Meghan Markle as she prepares for appearance with Prince Harry

It's a big week for Meghan Markle. On Thursday she will step out for her first joint public engagement with Prince Harry since returning to the UK.

And ahead of their outing, the Duchess had good reason to celebrate on Sunday.

A sweatshirt that she designed for charity sold out within a matter of hours, helping to raise funds for an important cause.

Meghan, 45, took to Instagram on Sunday to promote the jumper posing for a photograph while wearing the cosy top, which is in a neutral tone and has the words 'It's the Little Things' embroidered in chocolate brown across the back and at the sleeve.

The $100 (£75) sweatshirt was designed for Moms Offering More, a charity founded by Kasondra Herrendorf-Cohen. 

Meghan wrote: "We share one intention as parents: a safe and loving future for our children.

"We can all appreciate that 'the little things' ladder up to big outcomes, especially when it comes to the future of our children, and we are proud to work together on this initiative as we honour International Day of the Girl."

Meghan shares new video of Archie and Lilibet

Also on Sunday, Meghan posted a short new clip featuring her children, Archie, seven, and five-year-old Lilibet.

The youngsters were seen walking through a deer park, with Archie riding on a scooter as his little sister Lilibet ambled behind.

The siblings both sported backpacks, with Lilibet wearing a pink rucksack to match her dress. During one moment in the clip, the little princess turned off the path, possibly to take a closer look at the herd of deer running in the distance.

The Sussexes' beloved labrador, Pula, also trotted alongside the children as they walked down a tree-lined avenue in the park. The Instagram clip was soundtracked to the tune of The Temptations' My Girl, which features the opening line, "I've got sunshine on a cloudy day."

Harry and Meghan's first joint outing

The Sussexes are expected to visit Nottingham on Thursday. It's a meaningful choice for the couple; they made their first joint appearance after announcing their engagement in Nottingham back in 2017. 

They are due to visit a number of community projects, including Community Recording Studio (CRS).

It will be Harry and Meghan's first royal-style engagement together since they returned to the UK after stepping back from royal duties in 2020. 

However, a letter sent on the King's instruction last month insisted that the couple should be viewed as "private citizens".

The missive spelt out the non-working royal status of the couple, and reiterate that they will still not be able to use titles of "His and Her Royal Highness".

A spokesperson for Harry and Meghan said at the time that the couple "were a little surprised not to have been told about this in advance".

Nottinghamshire police will decide on the level of security provided during the visit as the couple continue to await the result of a review of their publicly funded protection by the royal and VIP executive committee.

Meghan's project with Malala Yousafzai revealed

Meghan has now finally revealed the reason behind her high-profile meeting with Nobel Peace Prize laureate Malala Yousafzai at London's Claridge's hotel on 7 October.

On Sunday, Meghan's As Ever brand shared two personal photographs of the mother-of-two enjoying afternoon tea with the education activist, with scones, pastries and cakes placed on the table in front of the pair.

Sharing a quote from the pair, the caption read: "'When we support the girls of today, we empower the women of tomorrow. Access to education is the key to unlocking this.' – Meghan, Duchess of Sussex & Malala Yousafzai."

It also announced a new partnership between the pair: "This International Day of the Girl [11 October], in partnership with Archewell Philanthropies, 100% of net proceeds from As Ever jams and teas will support Malala Fund and its vital work to ensure that every girl has access to free, safe, quality education. Tea for Two has never felt so good. Shop at asever.com."

The products include Meghan's signature fruit spreads and boxes of herbal tea.