Complete List Of Mt. Joy Band Members

Feature Photo: Matt Everitt, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons

Mt. Joy began when high school friends Matt Quinn and Sam Cooper unexpectedly found themselves living in Los Angeles at the same time. The two musicians had grown up near Philadelphia and played together as teenagers before following separate paths. Their reunion in 2016 revived that partnership and produced the early recording sessions that became the foundation of Mt. Joy.

Quinn and Cooper recorded the debut single “Astrovan” with bassist Michael Byrnes and producer Caleb Nelson. The song’s streaming success was followed by “Sheep,” “Cardinal,” and “Silver Lining,” helping the project grow into a full touring band with drummer Sotiris Eliopoulos and keyboardist Jackie Miclau. The group took its name from Mount Joy in Valley Forge National Historical Park, near the area where Quinn and Cooper grew up.

Mt. Joy released its self-titled debut album in 2018. “Silver Lining” reached number one at Adult Alternative radio and earned platinum certification, becoming the band’s first major commercial breakthrough. Rearrange Us followed in 2020, expanding the group’s arrangements and placing greater emphasis on keyboards, layered production, and the chemistry of the complete five-member lineup.

The band continued developing its sound on Orange Blood in 2022 and Hope We Have Fun in 2025. The latter included collaborations with Gigi Perez and Nathaniel Rateliff and reflected the scale of Mt. Joy’s increasingly ambitious live performances. By this period, the group had moved from clubs and festival support slots to sold-out appearances at Madison Square Garden, Red Rocks Amphitheatre, the Hollywood Bowl, TD Garden, and other major venues.

In May 2026, Mt. Joy released The Garden Mann, a twenty-four-track live collection drawn from performances at TD Garden, the Mann Center, Red Rocks Amphitheatre, Forest Hills Stadium, Governors Ball, and the Armory. The album captured the extended arrangements, improvisation, and audience interaction that had become central to the band’s concerts.

Matt Quinn

Matt Quinn co-founded Mt. Joy with Sam Cooper and serves as the band’s lead singer, rhythm guitarist, acoustic guitarist, and principal lyricist. Quinn and Cooper first played music together while attending Conestoga High School outside Philadelphia. When they reconnected in Los Angeles in 2016, their informal writing sessions developed into the songs that launched Mt. Joy.

Quinn’s voice gives the band much of its recognizable character, moving between conversational verses, high melodic choruses, and loose improvisational passages. His lyrics frequently explore relationships, anxiety, hope, memory, environmental concerns, and the tension between private life and a demanding touring career.

He sang and played throughout the albums Mt. Joy, Rearrange Us, Orange Blood, and Hope We Have Fun. Songs including “Astrovan,” “Silver Lining,” “Jenny Jenkins,” “Strangers,” “Lemon Tree,” “Orange Blood,” “Highway Queen,” and “Coyote” demonstrate the range of his writing and vocal approach.

Before committing to the band, Quinn attended law school and considered a career outside music. The growth of “Astrovan” and the group’s early singles persuaded him to pursue Mt. Joy full time. He has remained the primary frontman as the band’s concerts have expanded into longer sets built around spontaneous transitions, cover songs, and extended instrumental sections.

Sam Cooper

Sam Cooper co-founded Mt. Joy and serves as its lead guitarist and a key songwriter. His history with Matt Quinn began during their school years near Philadelphia, when the two first learned how to write and perform together. Their reunion in Los Angeles years later gave them the opportunity to approach music with greater focus and life experience.

Cooper’s guitar playing moves between concise melodic hooks, textured rhythm parts, blues-influenced leads, and long concert improvisations. His work complements Quinn’s acoustic foundation while helping Mt. Joy shift naturally between folk-influenced songwriting, indie rock, psychedelia, and the jam-oriented style of the band’s live performances.

He played on all four Mt. Joy studio albums and helped shape the arrangements of the group’s best-known songs. Cooper’s role became increasingly prominent as the band’s recordings developed from the relatively direct sound of the debut into the broader instrumental palette heard on Orange Blood and Hope We Have Fun.

Cooper and Quinn also contributed to “Santa Drives an Astrovan,” released on the 2024 charity album A Philly Special Christmas Party. The song connected Mt. Joy’s best-known early imagery with the musicians’ continuing ties to Philadelphia.

Michael Byrnes

Michael Byrnes joined the earliest Mt. Joy recording sessions as bassist and became one of the band’s founding instrumentalists. Quinn and Cooper connected with Byrnes after arriving in Los Angeles, and he played on “Astrovan” during the April 2016 session that established the group’s initial sound.

Byrnes supplies the low-end foundation beneath Cooper’s guitar, Quinn’s vocals, Miclau’s keyboards, and Eliopoulos’s drums. His playing is often melodic and spacious, supporting the songs without overcrowding their vocal and instrumental details. In concert, his bass lines provide the steady center that allows the other musicians to extend arrangements and move into improvised passages.

He has appeared throughout Mt. Joy’s studio catalog and remains a member of the touring lineup. Byrnes’s consistent presence links the original three-person recording project to the five-member group that later became known for large festival and arena performances.

Sotiris Eliopoulos

Sotiris Eliopoulos joined Mt. Joy as drummer and percussionist when the early studio project expanded into a complete live band. His arrival gave the songs a more powerful rhythmic structure and allowed the group to reproduce and enlarge its recordings onstage.

Eliopoulos combines direct rock drumming with restrained grooves, percussion accents, and dynamic changes. His playing can remain quiet beneath Quinn’s acoustic guitar before building into the large choruses and extended instrumental sections that characterize Mt. Joy’s concerts.

He has contributed to the band’s studio recordings and extensive touring schedule, including headline shows, festival appearances, and performances with the Lumineers and other established acts. His interaction with Michael Byrnes forms the rhythmic core of the five-member lineup.

Jackie Miclau

Jackie Miclau joined Mt. Joy on keyboards, piano, synthesizers, and backing vocals as the group developed into a five-piece touring band. Her addition substantially widened the band’s sound, bringing melodic piano lines, organ textures, electronic layers, and vocal support into arrangements that had begun with guitar, bass, and voice.

Miclau’s work became especially important on Rearrange Us, where keyboards and atmospheric production moved closer to the center of the music. Her playing continued to shape Orange Blood and Hope We Have Fun, supporting the band’s movement between intimate songwriting and expansive rock arrangements.

During live performances, Miclau helps connect songs through transitional passages and adds harmony, texture, and rhythmic detail. Her contributions have become an essential part of Mt. Joy’s concert identity and the balanced instrumental sound of the current lineup.

Mt. Joy Studio Albums

Mt. Joy (2018)

Rearrange Us (2020)

Orange Blood (2022)

Hope We Have Fun (2025)

Mt. Joy Live Albums

The Garden Mann (2026)

More Mt. Joy And ClassicRockHistory.com Articles

Check out more articles on ClassicRockHistory.com.

Updated August 1, 2026.

ClassicRockHistory.com claims ownership of all its original content and intellectual property under United States copyright laws and those of all other countries. No person, business, or organization is allowed to republish any of our original content on the web or in print without permission. All photos used are either public-domain Creative Commons images or officially licensed from Shutterstock for ClassicRockHistory.com. Photo credits appear in the article. Album-cover images used in affiliate links are the property of their respective owners and are stored on third-party servers. Unauthorized reproduction of this content may result in legal action against the infringing website.