>> RELATED: Dentist admits to killing beloved lion Cecil, writes letter to patients thanking them for support

"Goodbye, #CecilTheLion," Poehler wrote on Twitter. "Your roar will be remembered worldwide."

"Animals are not trophies. Ever. #CecilTheLion," Farrow added.

African wildlife officials on Tuesday accused Palmer, 55, of shooting the iconic lion with a crossbow after he and his hunting partners lured 13-year-old Cecil from a protected area. The hunters reportedly tracked Cecil for 40 hours before shooting the lion with a gun, the Australian Broadcasting Corp. reports. The lion was beheaded and skinned, and its tracking collar was removed, according to CNN.

>> RELATED: Office of dentist accused of killing Cecil the Lion becomes makeshift memorial

Palmer said he believed the hunt was legal.

In a letter posted to KMSP's website, Palmer said, "I had no idea that the lion I took was a known, local favorite, was collared and part of a study until the end of the hunt."

>> RELATED: American dentist accused of killing famed lion Cecil

Palmer reportedly is wanted on poaching charges, officials in Zimbabwe said. Johnny Rodrigues, chairman of the Zimbabwe Conservation Task Force, said Theo Bronkhorst and Honest Ndlovu, a hunter and private game park owner respectively, also face poaching charges. Rodrigues said Palmer paid Bronkhorst and Ndlovu more than $50,000 to hunt the lion.

Meanwhile, animal lovers across the country are striking out against Palmer and his dental practice, posting reviews on River Bluff Dental's Yelp page. Aonline petition also has been started that calls for justice for Cecil and for the country to stop issuing permits to kill endangered animals.

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