Eva and Sam Hendricks grew up in Westport, Connecticut, the children of devoted music fans. Eva first developed her interests in musical theater and also sang jingles for local commercials. She first met Spencer Fox, a former child actor who voiced Dash Parr in the 2004 filmThe Incredibles, outside of a Tokyo Police Club show at New York's Webster Hall. Fox moved to Westport mid-way through his junior year of high school and began collaborating with Eva on songs. Their earliest recordings, more acoustic, folk-based, and recorded in her bedroom, were posted to YouTube. Eva planned to go to New York University 's Clive Davis Institute of Recorded Music post-graduation, and wanted to have a finished product to enter the program with. She and Fox recorded an extended play under the Charly Bliss name, simply titled EP, which posted to Bandcamp in 2011. Their first tour was a six-month stint across Connecticut that was sparsely attended by friends and "a few drunk townies". Eva went on to attend NYU, while Fox attended the State University of New York at Purchase, and Sam Hendricks diverged to attend Ohio's Miami University. Their second EP, A Lot to Say, was released in 2013. The first iteration of Charly Bliss included bassist Kevin Copeland, who eventually left to pursue other interests. They toured consistently, opening for bands such as Sleater-Kinney, Wolf Parade, and Veruca Salt. In June 2014, they released the EP Soft Serve, which included a three-part video series as well as a comic book trilogy. After Copeland's exit, the band recruited Dan Shure on bass. He and Fox had met at theater camp as children and were longtime friends. At that time, Shure was directing off-Broadway productions but was an early fan of the band and did not want to miss the opportunity to join. They began recording their debut album, Guppy, in 2015, but shelved the first result, feeling as though it did not sound like them. "We were really highlighting the aspects of our sound that make us a garage band, or a punk band," Eva remarked in a later interview. But the group came around to the fact that each member favored pop music above all, and they re-recorded Guppy with this renewed focus in mind. Guppy was released on Barsuk Records in April 2017 to rave reviews from music critics. Following its release, the band went on tour across the U.S., and made their first-ever tour of the United Kingdom as well. In 2018, they opened for Death Cab for Cutie, and released the single "Heaven". They recorded their second album, Young Enough, with veteran producer Joe Chiccarelli, who has worked with U2, the Shins, and My Morning Jacket. Young Enough was released on May 10, 2019. On October 30, 2019, the band released Supermoon, an EP with five songs, recorded during the same sessions that produced Young Enough. In 2020, the group contributed a cover of the song "Pretend to Be Nice" from the Josie and the Pussycats for a tribute compilation celebrating the life of musician Adam Schlesinger.