No Doubt are forming a new rock group without frontwoman Gwen Stefani.

No Doubt members Tom Dumont, Tony Kanal and Adrian Young will partner with AFI frontman Davey Havok on a yet-unnamed supergroup, a rep confirmed to Billboard.

Supergroups, such as Audioslave, which featured Soundgarden singer Chris Cornell and Rage Against the Machine musicians Tom Morello, Tim Commerford and Brad Wilk, have proved successful in the past. Other examples include Cream and A Perfect Circle.

No Doubt and AFI both boast an impressive sales history, with the former having sold 16.3 million albums in the U.S. since 1992 and the latter 4.1 million since 1995. No Doubt last released Push and Shove with Stefani in 2012, while AFI dropped Burials in 2013.

Stefani is pursuing a solo career and will release her third solo album, This is What the Truth Feels Like, on Mar. 18. The 46-year-old singer and "The Voice" coach co-founded No Doubt in the late 1980s and released her debut solo album, Love. Angel. Music. Baby., in 2004.

"It just feels so much more natural being back in this mode," Stefani told the Guardian after Push and Shove's release. "The solo records allowed me to indulge my girly side but it was never meant to be taken seriously."

"It was like an art project that kept going longer than I expected," she added. "The group never ended -- we always knew we'd come back to make this album."

Stefani, No Doubt and Havok have yet to address the new supergroup on social media. Stefani did promote her new single, "Make Me Like You," on Friday, tweeting, "Turn it up loud! #MakeMeLikeYou."