The Italian-born style icon is partnering with the Swedish fast-fashion retailer in its latest designer collaboration, described as an "over-the-top" accessories collection.
The new line will feature jewelry, sunglasses, shoes, bags and a trolley, and is said to be an expression of Dello Russo's taste for ornamentation.
Dello Russo said she is excited by the collaboration, which marks the first time H&M has involved a fashion director in a special project.
"This is the sign of an important evolution in fashion, and I am both thrilled and humbled to be the one chosen to lead it," she said in a statement.
"I wanted to create precious accessories that are impossible to find. As a stylist I know accessorization is essential: it is the personal touch to any outfit. With these pieces everybody can have fun, turning an ordinary day into a fantastic fashion day.”
Dello Russo spent 18 years with Conde Nast Italia, starting off as a fashion editor at Vogue Italia before becoming editor of L'Uomo Vogue from 2000 to 2006.
She currently serves as editor at large and creative consultant for Vogue Japan.
In addition to her editorial work, Dello Russo has earned her share of attention and a fervent following among many fashionistas with her flamboyant outfits.
Dello Russo's new line with H&M is slated to be available on Oct. 4 in around 140 stories worldwide and online at hm.com.