Originally published on ProWrestlingSheet.

Adrian ‘Lionheart’ McCallum -- who was the current ICW World Heavyweight Champion -- has passed away.

ICW tweeted a statement on Wednesday confirming Lionheart's passing.

"We are heartbroken to learn of the tragic death of ICW World Heavyweight Champion, Adrian ‘Lionheart’ McCallum," the statement reads. "Adrian was a mainstay of ICW and British professional wrestling. Most importantly, he was our friend. His passing leaves a huge hole in the lives of those who knew him."

No details on the 36-year-old's cause of death have been reported at this time.

The wrestler's final tweet was Tuesday evening. He shared a quote from the Netflix series "Afterlife" which states: “One day you will eat your last meal, You will smell your last flower, you will hug your friend for the last time. You might not know it's the last time, that's why you must do everything you love with passion”

We here at The Sheet offer our most sincere condolences to Lionheart's family and friends.