Fontaines D.C. has shared the devastating news that their longtime manager, Trevor Dietz, has passed away. In a heartfelt statement released via Instagram, the Irish band confirmed that Dietz died this past Sunday (June 7), leaving the group “utterly heartbroken.” A specific cause of death has not been disclosed.

“Trevor was with us from the very beginning of our journey,” the band wrote in their tribute. “We have never known a version of Fontaines D.C. without him; he was, for all intents and purposes, the sixth member of the band. He cared deeply for us and stood firmly for what was fair and just in the world. He was a man of unwavering conviction, and we will miss him profoundly.”

The band has requested privacy for his family and loved ones during this difficult period.

Dietz was a pivotal figure in the band’s rise, working closely alongside the team at Wildlife Entertainment. His influence stretched back to the group’s formative years, having also served as a promoter for the renowned Dublin music venue, The Workman’s Club.

Throughout their professional partnership, Fontaines D.C. saw a meteoric ascent, releasing four acclaimed studio albums: Dogrel (2019), A Hero’s Death (2020), Skinty Fia (2022), and Romance (2024). The latter earned a Grammy nomination in 2025, and their recent tour saw the band headline a massive 40,000-capacity show at London’s Finsbury Park. The band remains slated to headline the Reading & Leeds Festival later this summer.

Dietz, who also managed the Garage Bar, took on the role of band manager in 2016. During a 2019 lecture at the Music Industry Xplained (MIX) course, he reflected on the band’s early potential. “I wouldn’t have committed to this if they didn’t have massive ambitions and dreams,” he explained. “Others might have thought it sounded crazy, but I knew we could take this well beyond Ireland. Above all, you need a band that aligns with your vision and possesses honesty and accountability.”

Following their 2017 debut single, “Liberty Belle,” the band signed with Partisan Records before moving to XL Records in 2024. Reflecting on their creative dynamic in 2019, Dietz noted, “They had the guts to be lyrically vulnerable and share their ideas. As a manager, you want the confidence of knowing your band is capable of driving their own momentum.”

In that same interview, Dietz spoke to the integrity of his career, stating, “My highlight has been surviving in this industry for twenty years without having to compromise my values. I’ve never felt forced to promote an artist or project that I didn’t truly believe in.”