2016 is not off to the happiest of starts for Big Bang Theory actress Kaley Cuoco, who not only was left without reason to celebrate on what would have been her second wedding anniversary, but was forced to also mourn a big loss to her family as well.

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The actress took to Instagram on New Year's Eve, which would have been her second anniversary with Ryan Sweeting, to share news that her family dog--the first one the pet-lover had--had passed away.

 Anyone who knows me, knows Petey. He was basically the first dog I ever had... 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. 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...

A photo posted by @normancook on Dec 31, 2015 at 2:42pm PST

"Anyone who knows me, knows Petey. He was basically the first dog I ever had...I was gifted him on my sweet 16, by my bf at the time..I was afraid I would get in trouble so I had 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!" she captioned a collage of photos with the dog. "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."

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"My folks gave him the greatest life and he taught us what it meant to love an adoption pup," she 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."

Cuoco has notably adopted four dogs of her own over the years, Norman, Shirley, Ruby, and recent addition Chester, who she adopted after her split from Sweeting.

Cuoco and Sweeting married on New Year's Eve 2013, but announced they were divorcing in September, after 21 months.