Most recently, she made headlines with songstress Taylor Swift as the duo designed a capsule collection her new album Lover.
This followed this news that McCartney was parting ways with luxury group Kering, which saw her company become part of the LVMH umbrella, where she also assumed a new role as a sustainability advisor to group head Bernard Arnault.
And, back in March, the British fashion designer's AW19 collection was the talk of the town during Paris Fashion Week as eco-friendly garments were designed for the focus of her show to be upon the ancient and endangered Leuser ecosystem in Sumatra, Indonesia.
This season, the brand states that their Spring 2020 collection is their most sustainable yet, with over 75 per cent of materials marked as eco-friendly.
Saving the planet has been somewhat in vogue of late, with luxury brands recently making strides toward having a better environmental footprint.
However, McCartney has championed such causes since her empire's inception, and it will be interesting to see how much further it can go as it continues to evolve.
Here's everything you need to know about the collection.
The backdrop for her Spring 2020 fashion show featured videos on a loop of, well, humping animals across species, all while "Love to Love You Baby" echoed in the background.
The materials were used from one of her many eco-friendly sources, like organic cotton, recycled polyester, Econyl and hemp.
Entwined throughout was also a lovely message about the circle of life which figured rather literally into circle-shaped skirts and tops with circular cutouts around the abdomen.
Instead of a press release with details of the collection under each chair was an “Eco-Manifesto” with a timeline that detailed the brand’s dedication to promoting ecological awareness over the last 20 years.
The pamphlet also challenged “the fashion industry every day to be better, questioning things as they are and driving change”. Although not explicitly named, the designer invoked climate activist Greta Thunberg writing “the younger generation is standing up and telling us that our house is on fire”.
The remaining 25 per cent of fabrics were mostly organic cotton or upcycled denim. The announcement that this is the most sustainable season ever for Stella McCartney comes as the brand announces its new Koba faux fur, an alternative to existing non-degradable plastic options.
Worn by Russian model Natalia Vodianova to the Paris show, this faux fur is made from a corn byproduct blended with recycled polyester.
READ MORE: Recycling Old Bras Has Just Been Made Easier