By Jessica Derschowitz
Updated January 02, 2016 at 05:43 PM EST
Imeh Akpanudosen/Getty Images

Kaley Cuoco shared a touching Instagram post on New Year’s Eve mourning the death of her beloved dog, Petey.

The Big Bang Theory star posted a set of four photos of her with the pup, captioning the collage with stories about Petey and what he meant to her and her family.

“Anyone who knows me, knows Petey. He was basically the first dog I ever had…” she wrote. “I was gifted him on my sweet 16, by my bf at the time.. I was afraid I would get in trouble so I hid him in my bedroom for 3 days until my parents found out- they said I had to take care of him if I was to keep him , that he would be mine! I was so excited!!”

“When I moved out of my parents house at 17, I had plans to take him with me but he had stolen my parents hearts and they wouldn’t let me! Here we are 15 years later. My folks gave him the greatest life and he taught us what it meant to love an adoption pup,” Cuoco continued. “I have since named my corporation after him (peteypie inc) and he has brought a lifetime of joy and laughs to our entire family. I know he will now enjoy doggie heaven where there will be an abundance of greenies just for him. This little guy, I will never ever forget…”

You can see her full post below.