The sportswear company just announced that the 38-year-old English designer has been named creative director for Team Great Britain during the 2012 Olympic and Paralympic Games, which will take place in London, where McCartney was born.
"As a British fashion designer it is an amazing, once-in-a-lifetime opportunity to be creative director of Team GB as the hosting nation of the London 2012 Olympic Games," McCartney said in a statement.
The cult-followed, eco-friendly designer, who is expecting her fourth child, will be busy creating both the uniforms for Team GB and Olympics-themed apparel for fans, the latter of which will launch this fall.
Adidas, the official sponsor of the 2012 Summer Games, has been dressing Team GB since 1984 and has been involved with the Olympics since 1928.
The appointment of McCartney, who also designs the very successful Adidas by Stella McCartney women's performance line, marks the first time a major designer has collaborated with a top sports brand to design Olympic uniforms.
Here's hoping this announcement might inspire some homegrown designers (cough! Marc and Donna! cough!) to suit up Team USA and give Team GB a little style competition.
In related news, check out McCartney's pal Gwyneth Paltrow on the cover of Vogue.