Meanwhile, Jack Hanna defends the Cincinnati Zoo's decision while other celebs weigh in on the controversy.
Kaley Cuoco is ready for you to "bring on the hate!!!!" after weighing in on the killing of a 17-year-old gorilla at the Cincinnati Zoo over the weekend.
Harambe the gorilla was shot and killed after a 4-year-old boy slipped into his enclosure at the Ohio zoo on Saturday. While zoo officials have defended their decision, calling the incident "life-threatening," the Big Bang Theory actress blasted it as "horrendous" on Instagram.
"Another senseless horrendous animal being killed over people not using their brains," she wrote. "If you watch the footage, you see this gorgeous animal holding that child's hand. Do with that, what you will. As sad as this makes me, a part of me is happy for that amazing creature doesn't have to live in captivity another day."
WATCH: Kaley Cuoco Kisses Karl Cook After Horseback Riding-Filled Weekend
Other celebs, including Ricky Gervais and Real Housewives of Beverly Hills star Lisa Vanderpump, have also weighed in, with the latter tweeting, "Oh the poor gorilla, he did nothing wrong."
In a statement to ET, the family of the 4-year-old boy, Isaiah, said, "We are so thankful to the Lord that our child is safe. He is home and doing just fine. We extend our heartfelt thanks for the quick action by the Cincinnati Zoo staff."
"We know that this was a very difficult decision for them and that they are grieving the loss of their gorilla," it reads. "We hope that you will respect our privacy at this time."
Meanwhile, famed zookeeper and TV personality Jack Hanna, who serves as director emeritus of the Columbus Zoo, told CBS This Morning that he agrees "1,000 percent" with the zoo's choice to put down the gorilla.
"They made the correct decision. Matter of fact, it's a millisecond decision," Hanna explained. "All of us are sorry. We're all, in the zoo world, heartfelt for this whole thing, but thank goodness a human being is alive today because of the decision that the zoo made."
"Just watch your kids," he added. "I'm sure that the mother here did the best she could. I guess maybe she was doing something else, I don't know, I wasn't there."
With Zelda Williams speaking out on the killing of Harambe, look back on the touching way Koko the gorilla mourned her friend -- and Zelda's father -- Robin Williams in the video below.