Lou Koller, the iconic frontman of the New York City-based punk band Sick Of It All, has died at the age of 59. His death follows a two-year struggle with cancer.

Sick Of It All, formed in 1986, announced Koller's passing in an emotional statement shared on Instagram Friday. "It's with unbelievable sadness that we announce to our worldwide hardcore family the passing of our brother Lou Koller," the band wrote. "The level of loss that we feel at this time is overwhelming."

Koller was celebrated for his energetic stage presence and ability to connect with audiences globally. "Lou had the power to raise everyone's spirits at our shows with a smile and a sarcastic comment, and he won people over wherever we played, from every culture and every corner of the world," his bandmates stated. They also described him as "a beloved friend and an iconic frontman."

The band's statement also acknowledged the support from fans who contributed to Koller's medical fund. "At this time of intense grief, we must again acknowledge the great help and support offered by everyone who donated to Lou's medical fund. You all helped Lou feel very special and very loved as he battled away these last two years."

His death was confirmed by the late singer's bandmates who shared an emotional statement to Instagram on Friday

Koller had publicly shared his diagnosis in June 2024, revealing that doctors had discovered a tumor in his esophagus. His bandmates expressed hope that he could now rest. "Koller's battle is over now and he can finally rest. Hopefully he can somehow still see and feel the beautiful, positive mark he left on the world."

Sick Of It All was approaching its 40th anniversary, an event Koller's passing preceded. His "camaraderie, commitment and enthusiasm were always steadfast throughout the years," the band members said.