The 23-year-old ex Victoria's Secret Angel announced the news on Instagram with a photo of herself running through the mountains of Tahoe. 'Fashion and fitness are two of my great loves. I am delighted to be joining the Adidas by Stella McCartney fam,' she captioned the pic.
In the campaign images Kloss appears wearing swimsuits, leggings and athletic shorts as she displays her athleticism.
'Karlie is a true Adidas by Stella McCartney woman,' Stella McCartney said in a statement. 'She has that unique energy that drives others whether she is in front of the camera or challenging herself on the gym or on the track, all while expressing her own style.'
The Adidas x Stella McCartney collection is available now on the Stella McCartney and Adidas websites.
Check out some more images from the campaign below and sound off on twitter @fmd1_com using the hashtag #lovefmd.