YouTuber Steve Cash, known for his "Talking Kitty Cat" video series, has died by suicide, according to a Facebook post from his wife. He was 40 years old.

Nampa Police Department in Idaho found Cash dead of a self-inflicted gunshot wound, E! reports, on Thursday morning with no signs of foul play.

"This is so hard. I’m not even sure what to say, or for that matter, what to do," Celia DeCosta Cash wrote on Facebook. "I just lost my best friend, my sidekick, my lover, my mentor, my absolute everything, this morning. I’m so sad to say, my husband, Steve Cash took his own life this morning."

Fans expressed their grief online, sharing messages of support for fellow fans and Cash's friends and family.

RIP Steve Cash (#SteveCash83 from YouTube) We will all miss him. He made smiles on many people's faces with his content, he was an amazing guy. It's so sad to hear about this. He was a major part of my childhood. Rest in peace dude, we all love you and miss you. 😭 pic.twitter.com/nu9npGHqCx

— Malvin John Carson (@MalvinGamerPoni) April 17, 2020

Rest in peace Steve. You brought me so many laughs in middle school . And also an inside joke between my friends (Help Todd) . Thank you for everything. #SteveCash83 pic.twitter.com/p1nAtrYf3i

— Thereza Sedillo (@Therezasedillo) April 18, 2020

Joining YouTube in November 2017, Cash amassed a following more than 2 million subscribers on the platform. Talking Kitty Cat, his popular comedy series, features Steve dealing with the hijinks of talking animals.

Talking Kitty Cat reached the height of its popularity in 2015, reaching more than 17 million views. The series regularly received more than 3 million views per episode. Cash published what would be his final installment in December 2019.