Richard Harrison, who was referred to ‘The Old Man’ on the television series ‘Pawn Stars,’ has died.

Harrison’s son and co-star for the History channel series, Rick Harrison, made the announcement on Instagram Monday, attributing his father’s death to Parkinson’s Disease.

Richard Benjamin ‘The Old Man’ Harrison passed away this morning surrounded by those he loved. He will be tremendously missed by our family, the team at Gold & Silver Pawn and his many fans the world over. He was my hero and I was fortunate to get a very cool ‘Old Man’ as my dad. That I got to share him with so many others and they got to see what a great family man he was is something I am grateful to have experienced with him. He lived a very full life and through the History television show ‘Pawn Stars’ touched the lives of people all over, teaching them the value of loving your family, hard work and humor. We appreciate everyone’s thoughts and prayers and ask that we are provided some privacy at this time.

The History channel also mourned the TV star:

“We are deeply saddened by the loss of our friend Richard ‘The Old Man’ Harrison, a beloved member of the HISTORY and ‘Pawn Stars’ family,” the statement reads. “He will be greatly missed for his wisdom and candor. Our thoughts are with the Harrison family during this difficult time.”

Grandson and co-star, Corey Harrison, also reflected on his relationship with ‘The Old Man’:

“I was lucky enough to spend 15 years of my life working with the old man. He wasn’t just a grandfather, he was truly a best friend as well. I’m truly blessed to have had him as a mentor.”

According to USA Today, Harrison, a former navy man, moved his family to Vegas in the hopes of creating a new beginning and opened the Gold & Silver Pawn Shop in 1988, according to a bio from the network’s website. Harrison helped assess items brought into the shop with a memorable blunt and no-nonsense approach. As the store sees many unique items, experts are often called on to determine value and authenticity.

The Harrisons and their pawn shop rose to fame on the hit History Channel series “Pawn Stars,” which premiered in 2009 and has been on the air for 15 seasons.