The 34-year-old mother-of-two, who has two-year-old son Bingham with her fiance Matt Bellamy and Ryder, 9, with her ex-husband Chris Robinson, has aimed her new line at working professionals and mothers on-the-go, reported Women's Wear Daily.
"I've always lived an active lifestyle, and with two boys life has only gotten busier. As a working mom, I know what it's like to be on the go and running around from one activity to the next. Sometimes you just don't have time to change, but you still want to look cute," Hudson said.
Just Fab specialises in affordable footwear for members, who pay a monthly subscription fee, but the partnership marks its first venture into sportswear.
Hudson previously launched a women's clothing collection with US label Ann Taylor.