Negin Mirsalehi has a major fashion collaboration up her sleeve.

The Dutch influencer, who counts 5.5 million followers on Instagram and over 326,000 YouTube subscribers, has teamed up with Express Inc. on a clothing collection. The series, dubbed Express x Negin Mirsalehi, will span about 50 separates, including jumpsuits, sweaters and blazers.

In the words of Mirsalehi, the collection, created for "women who love to explore, take risks, and try new things" and inspired by the influencer's own career experiences, is "perfect for mixing and matching."

Tim Baxter, chief executive officer at Express, also emphasized the "versatile pieces" that make up the capsule.

The collection, which marks the first major fashion design partnership for the star, is due to launch on September 5, priced from $49-178. It is the latest in a string of career milestones for the star, who founded her haircare line Gisou in 2015. 

Influencer-led fashion collections remain big business in the apparel industry.

In June, the Brazlian vlogger Camila Coelho unveiled her own line, ‘The Camila Coelho Collection,' in partnership with the retailer Revolve, just weeks after the social media star Aimee Song also teamed up with the company on her own line, ‘Song of Style X Revolve.'