The American Civil Liberties Union has crafted a letter of support for free speech and condemning Disney's suspension of Jimmy Kimmel.
The Hollywood Reporter states that 400 celebrities have signed the open letter.
According to the report, the letter reads efforts to pressure artists, journalists and others with retaliation for their speech "strike at the heart of what it means to live in a free country."
Some of the celebrities who have signed include Jennifer Aniston, Jason Bateman, Robert De Niro, Jane Fonda, Selena Gomez and Tom Hanks.
"We now find ourselves in a modern McCarthy era, facing exactly the type of heavy-handed government censorship our Constitution rightfully forbids," Anthony D. Romero, executive director of the ACLU, said, per the report. "The silencing of Jimmy Kimmel and jawboning of media outlets through lawsuits and threats to their licenses evoke dark memories of the 1950s. We must remember, however, that Senator McCarthy was ultimately disgraced and neutralized once Americans mobilized and stood up to him. We must do the same today because together, our voices are louder and together, we will fight to be heard."
Kimmel was suspended following a comment in his monologue about MAGA's reaction to the murder of Charlie Kirk.
Kimmel called Kirk's death a "senseless murder" a day after the fatal Utah shooting, and he condemned those who appeared to celebrate it -- as well as Trump for trying to cast blame on the "radical left."
He also talked about the aftermath during his show both Monday and Tuesday, targeting the response from both Trump himself and the president's supporters, whom he accused of "working very hard to capitalize on the murder of Charlie Kirk."
The comic focused particularly on the alleged shooter, Tyler Robinson.
"The MAGA Gang (is) desperately trying to characterize this kid who murdered Charlie Kirk as anything other than one of them and doing everything they can to score political points from it," Kimmel said in his Monday monologue. "In between the finger-pointing, there was grieving."
Kimmel said that Trump's response "is not how an adult grieves the murder of someone he called a friend. This is how a 4-year-old mourns a goldfish, OK?" He also said that FBI chief Kash Patel has handled the investigation into the killing "like a kid who didn't read the book, BSing his way through an oral report."