When We Were Young returns to Las Vegas, Nevada on October 18-19, 2025, bringing together an impressive lineup of rock, punk, pop rock, and metal artists for two days of nostalgia-driven performances. The festival features major headliners including blink-182, Panic! At The Disco, Weezer, Avril Lavigne, and The Offspring, alongside fan favorites like All Time Low, Taking Back Sunday, Yellowcard, and Simple Plan. With 41 total artists spanning the rock and alternative music spectrum, the event caters to fans of early 2000s pop punk, modern rock, and metal genres. The lineup includes both veteran acts and contemporary artists like I Prevail, Beartooth, and Knocked Loose, creating a diverse mix that appeals to multiple generations of rock music fans.