Donald Trump started off his Thursday morning like he did many others, with a controversial series of tweets that didn't go over well with his critics. While the president usually vents on social media, his latest tweets might have finally crossed the line.

Hollywood on Trump

If there's one thing that is for sure about Donald Trump it's that he is not a fan of the mainstream media. For the better part of the last two years, the former host of "The Apprentice" has spent his days blasting the press, ridiculing journalists and shaming cable news outlets.

Whether it's newspapers like the New York Times and Washington Post, cable news channels like CNN and MSNBC, or individual reporters and hosts like Megyn Kelly, Trump has found a way to expand his obsession with hitting back against the media. Trump's latest attack came in the form of a pair of tweets where he singled out the hosts of MSNBC's "Morning Joe." The feud between Donald Trump and Joe Scarborough and Mika Brzezinski has increased over the last year, as the once friendly relationship has spiraled into a near hatred. On Tuesday morning, Trump labeled Scarborough as a "psycho," while then accusing "low I.Q." Brzezinski of bleeding from a facelift while allegedly attempting to spend time with him on New Year's Eve.

The backlash grew by the minute, which included some harsh criticism from big names out in Hollywood, as seen across Twitter on June 29.

In various tweets on Thursday, popular names in Hollywood came out to show their support for Mika Brzezinski and Joe Scarborough, while not holding back their thoughts on Donald Trump in the process.

"Besides possible obstruction of justice & treason, we have a childish mentally unstable bully in the WH. We have 25th Amend. for a reason," actor and director Rob Reiner tweeted out.

"The president is a hurtful, bullying, boorish, ridiculous, undignified, childish asshat.

And it hurts to say that," author Stephen King wrote on his Twitter feed. In a follow-up post, King also added, "The viciousness of Trump's tweets is disturbing, the pettiness perhaps more so. This guy is not cut out for the main stage."

"So, can we dispense with the notion that Donald is going to "grow into the job" or become 'more presidential' yet?" actor George Takei posted.

"You're a horrible, hurtful, human, @realDonaldTrump. I'm embarrassed that you are representing America this way," actress Alyssa Milano added. "

Harry Potter author J.K. Rowling re-tweeted Donald Trump's attack on Mika Brzezinski, while attaching a quote from Abraham Lincoln reading, "'Nearly all men can stand adversity, but if you want to test a man's character, give him power.' Abraham Lincoln." "POTUS likes to punch down.

Whether it's anchors, US Attorneys, or stand-up comics. Meanwhile, millions are about to lose health insurance," comedian Kathy Griffin wrote.

Celebs on Sanders

While many focused on Donald Trump, other Hollywood stars decided to turn their attention to deputy White House Press Secretary Sarah Huckabee Sanders for her constant defense of the president's tweets. "There is no medication on Earth that Sarah Huckabee Sanders can take to keep her from hating herself at the end of every day," Alec Baldwin tweeted.

Actor George Takei returned to his social media feed, this time throwing shade at Sarah Huckabee Sanders.

"So, is "I'm rubber, you're glue, whatever you say bounces off me and sticks to you" the official White House communications strategy now?" Takei wondered. As the backlash continued, it was clear that the opposition to Donald Trump was just getting started.