Songfacts®:

• Alex Warren lost his father to cancer when he was 9 and his mother to alcohol-related illness when he was 21. "Eternity" is his way of turning that pain into something melodic and human.
• Warren sings of the void left by loss:
  
  Feels like an eternity since I had you here with me
  Since I had to learn to be someone you don't know
  
  Warren sums up the strange identity shift that grief demands; becoming someone your loved one will never meet.
• The song is Warren's attempt to explain what grief feels like, not just what it is. His music is his way of parsing trauma; a kind of emotional shorthand that bypasses therapy couches and goes straight for the stereo. On "Bloodline," for instance, he describes escaping a troubled lineage, including his mother's struggle with addiction and the legacy of suffering.
• Warren released "Eternity" as the fourth single from his debut studio album, You'll Be Alright, Kid. The album serves as a continuation of his 2024 extended play You'll Be Alright, Kid (Chapter 1), expanding upon its themes and adding 10 new tracks.
• Warren collaborated closely with a tight-knit creative team: songwriter and lyricist Cal Shapiro, topliner Mags Duval, and producer Adam Yaron for You'll Be Alright, Kid. Together they form the emotional engine room behind not only "Eternity" but also such hit singles as "Carry You Home," "Burning Down," "Ordinary" and "Bloodline."
• Despite its origins in grief, "Eternity" has become - somewhat improbably - a wedding song. Warren told The Los Angeles Times that to his surprise, listeners began latching onto the song's undercurrent of enduring love. "It's cool that people are making it their own," he commented.
• "Eternity" was the last song written for the You'll Be Alright, Kid album. Adam Yaron told Billboard he had been close to Warren's journey with loss from early on. "I met Alex a few months after he lost his mom, so I've been really close to his journey with loss," he said. "We had so many conversations about his dad and his mom... It came up that we hadn't really tackled grief yet. It became apparent that it's such a big part of his story, and we had to go there. The song breaks my heart."
  
  He explained that some of the lyrics, like "I walked this world alone," came from Alex grappling with not having his parents there to witness his growing success. "I know he really believes that they are watching him in some capacity," Yaron said.
  
  Musically, the track was a challenge to put together, but once they knew the story they wanted to tell, it "just started spilling out."
• Warren was joined by a drumline when he performed this song, along with "Ordinary," at the MTV Video Music Awards in 2025. He won Best New Artist that year, beating out Lola Young.
• Alex Warren joined forces with Gigi Perez to deliver a duet version of "Eternity." The pair previewed their rendition during Warren's Lollapalooza Chicago appearance on July 31, 2025 and released it on December 5, 2025.
  
  Perez lost her older sister Celene during the early stages of the COVID-19 pandemic. On her social media, Perez links "Eternity" to her journey learning to live without Celene, saying it feels like the kind of song she wished she had early in that process and thanking Warren for how openly he writes about loss.