Boston radio host Kevin Karlson has died unexpectedly, 100.7 WZLX announced Friday morning.

Karlson was a staple on the classic rock station for almost two decades. He was a host on the morning show with Pete McKenzie and Heather Ford.

Karlson reportedly passed away in his sleep at home.

“It is with great sadness that 100.7 WZLX shares news of the unexpected passing of our friend, Kevin Karlson,” 100.7 WZLX posted on Friday.

“For almost 20 years, Kevin helped wake up Boston with humor and classic rock,” the rock station added. “We invite you to share your memories of Kevin as we celebrate his life… From all of us at WZLX — Rock in peace, Kevin.”

Loyal listeners were calling up the radio station to share their memories of Karlson, saying their mornings won’t be the same without Karlson.

“Absolutely heartbroken,” a show listener said.

“He’s going to be missed severely. So sorry for all of your loss,” another one said.

There was also an immediate outpouring of support and tributes on social media.

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“What a sad sad loss,” posted Rich Shertenlieb of 98.5’s Toucher and Rich. “Kevin was always nice to Fred and me when we were getting our feet wet at CBS. Thoughts to the K&M crew. You will be greatly missed.”

“awful news,” posted Scott Zolak of 98.5’s Zolak and Bertrand. “loved my hits on their show every week & always loved seeing them in the old building. such a sad day, a great guy.”

“We lost a member of our Family today,” posted Kenny Young, on-air talent and producer at WZLX. “Rest in Peace, Hug your loved ones….”

WZLX posted, “If you have a memory you’d like to share please call us at 617-931-1007, we’d love to hear from you.”