Kaley Cuoco and Karl Cook
Kaley Cuoco and Karl Cook now go by the hashtag “KCsquared” on social media. Pictured: Cuoco and Cook attend the Longines Masters Gala, in Long Beach, California, on September 29, 2016. Getty Images/Valerie Macon

Kaley Cuoco and boyfriend Karl Cook are madly in love with each other!

Just recently, the “Big Bang Theory” actress revealed that Cook saved a tree and made her a bench out of it. Cuoco appreciated her boyfriend’s efforts so much that she decided to post a photo of the beautifully-made bench on her Instagram account. On her caption, Cuoco also used her and Cook’s new hashtag, “KCsquared,” which stands for the first letters of their names.

Coincidentally, Cook named her Instagram account handle after her dog, Norman. And even before she and Cook became a couple, her name on Instagram has always been “normancook.” Years later, she ended up dating the professional equestrian who has the same “Cook” surname.

But other than their initials, Cuoco and Cook also share their love for dogs and horses. Every now and then, they would post photos of their pets via their respective social media accounts. Earlier this month, “The Wedding Ringer” actress even shared a snap kissing her boyfriend’s horse, Tembla, and joked about making Cook jealous.

Cuoco and Cook met at an equestrian competition a few years ago. While speaking with People last month, Cuoco gushed over Cook and said, “He’s great. He’s got a big bulldog and many horses and luckily, I found a guy who likes dogs as much as me. That’s on my number one list – ‘Must love dogs!’”

The actress, who plays Penny in “Big Bang Theory,” also shared that two of them spend time riding their horses together. “We ride together and we both have a significant amount of horses in separate ranches. So we keep that separate, but we’ve done horse shows together and we travel together and that has definitely been a big part of our relationship.

Last month, Cuoco joined Cook and his family for a short trip in Australia. In an interview with Entertainment Tonight, Cuoco said that she feels blessed to have spent time with Cook’s family. “It was phenomenal. I’d never been. I feel very lucky, and they’re wonderful people, so that was amazing,” she said.