Billie Eilish spent July touring the U.K., and during the concerts she debuted an Air Jordan collaboration so quietly it’s gone unnoticed until she posted a close-up photo Wednesday on her Instagram page.

The Billie Eilish x Air Jordan 4 has the makings of her biggest sneaker yet and was worn by her in two colorways. Both are predominantly clad in black, with her Blohsh stick figure logo is embroidered onto the lateral heel with its legs carrying over onto the midsole. This and another portion of the midsole carry a blue, black and red tartan in the edition posted to Instagram, which is then repeated on the mustache, netting and eyelet wings. A second colorway swaps the tartan for a black and green houndstooth that can be seen in Getty images from the July 10 show at The O2 Arena.

Eilish has been collaborating under the Nike umbrella since 2021, hitting Nike proper, Jordan Brand and Converse. She’s released several versions of the Air Force 1, both as a high and low-top, as well as the Alpha Force 88. Through Jordan Brand, she kicked off her sneaker projects with an Air Jordan 1 KO and Air Jordan 15 in 2021. Her most recent release came in 2024 through customizable Chuck Taylors from Converse’s By You platform.

Jordan Brand has really leaned into the Air Jordan 4 in 2025, with this week’s revival of Undefeated’s collaboration from 2005 being one of the most anticipated releases of the year. Nigel Sylvester’s Air Jordan 4 Brick by Brick is widely considered a frontrunner for sneaker of the year, and the return of the original White Cement colorway was also well-received. Last year, Nike SB collaborated on the sneaker for the first time and retooled it subtly for skateboarding in Pine Green, which was then followed up this spring with a Navy edition.

Information beyond what can be seen of the Billie Eilish x Air Jordan 4 has yet to be revealed, but Footwear News will keep you abreast of any updates.