A week after they announced their reunion, Nick, Joe and Kevin Jonas joined James Corden Monday on The Late Late Show to discuss why they wanted to get together again. “About a year-and-a-half ago, we started filming a documentary… [that] tracks kind of our childhood into our time in the band, and it was gonna be a story about where we are today,” Nick explained. “With separate lives, doing separate things — Joe with DNCE, me with my solo stuff.” While they were filming, he said, the started to “realize that there was a magic that we felt like we were missing.” The documentary will soon be available on Amazon Prime, but a release date has not yet been announced.