They had no plans to perform again until the offer came in for Best Friends Forever.
Rilo Kiley, meanwhile, have just reunited following a 17-year hiatus.
They kick off their tour on May 5 at the Fremont Theater in San Luis Obispo, California.
Musician/vocalist Chris Simpson of Mineral performs on stage during Day 1 of Fun Fun Fun Fest at Auditorium Shores on November 7, 2014 in Austin, Texas.Rick Kern/WireImage
Planning this reunion over these past months has been like reconnecting with family.
We havent missed a beat, Rilo Kiley bassist Pierre de Reeder said in a statement.
The stakes are only to have a good time, to revel in this nostalgia.
Festivals catering to the same audience as Best Friends Forever have become quite popular over the past few years.
That bill includes a Panic!