Wendy Williams is being blasted for making fun of a scar above Joaquin Phoenix's lip, which she called a "cleft palate" scar.

During the “Hot Topic” segment of "The Wendy Williams Show" on Jan. 7, Williams revealed she found the "Joker" star "oddly attractive," noting that she even liked the actor's scar.

“When he shaves off his mustache he’s got a hairline fracture, he’s got one of those — what do you call it? Cleft lip, cleft palate," said Williams, 55.

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As she spoke, Williams pulled her lip up with her finger to mock the condition, which happens when a baby’s lip or mouth do not form properly during pregnancy, according to the Centers for Disease Control and Prevention.

Wendy Williams made fun of cleft palates while talking about "Joker" star Joaquin Phoenix's appearance. Marilla Sicilia / Getty Images

Though Phoenix hasn't spoken publicly about the scar, an October 2019 profile about him in Vanity Fair described it as "not a surgically fixed cleft, he says, but a nonsurgical scar he was born with."

Late Wednesday, Williams apologized for her comments, writing on Twitter that her show plans to donate to organizations that benefit people affected with cleft lip.

. @Bighill44 We’re thinking about Beau today as he is in surgery. I want to apologize to the cleft community and in Beau’s honor, our show is donating to @operationsmile and @AmerCleftPalate and encourage our Wendy Watchers to learn more and help support the cleft community. — Wendy Williams (@WendyWilliams) January 16, 2020

The Oscar nominee hasn't responded to Williams' remarks, but many parents and activists have slammed the host's insensitivity.

Today is Beau’s big day. He is getting his lip repaired today in Winnipeg by the fantastic Dr. Ross. Thanks to everyone who has reached out, and in advance, thanks for any of your well wishes for Beau. He is so loved! #cleftstrong #1in700 #cleftcutie pic.twitter.com/n3MxaLvl5f — Adam Bighill (@Bighill44) January 15, 2020

Adam Bighill, a Canadian professional football player who was born with a cleft lip and palate and whose son Beau was also born with the condition, has been demanding an apology from Williams for days on Twitter.

Thank you @FarhanLaljiTSN at the end of the day this is something we can all rally behind, and that’s a mission to #endbullying . @WendyWilliams comments/actions towards the cleft community clearly promotes bullying. @saints @nfl @cfl https://t.co/SPNmBkdxIn — Adam Bighill (@Bighill44) January 15, 2020

"@WendyWilliams comments/actions towards the cleft community clearly promotes bullying," Bighill tweeted Wednesday.

Another angry father wrote, "For a solid 10 seconds she used her finger to mimic a cleft lip while the audience laughed. Imagine how my 5 year old would take it if he saw it?"

Carol Vorderman, a British TV personality who called herself an ambassador for the Cleft Lip and Palate Association, also condemned Williams.

“Mimicing (sic) a cleft lip, and making a joke about it, is disgraceful. Have you any idea the pain and operations a child with cleft must go through as they grow?” she tweeted.