Diddy was among the celebrities to call out the President for his comments, sharing a side-by-side image of Nazis with Trump's words "very fine people" over it and Kaepernick and fellow 49ers players labeled with the words "sons of b-----es."
"THE LINE HAS BEEN CROSSED!!!! Time to show them #blackexcellence LETS GO! #teamlove REPRESENT REPRESENT!" the famous rapper wrote.
Diddy, 47, also posted a minute-long video to Twitter offering his support to the players in the NFL — urging them to protest in unity during the Sunday games.
John Legend weighed in on Trump's words from Friday evening where he said in a speech: "Would you love to see one of these NFL owners, when somebody disrespects our flag say, 'Get that son of a b---- off the field right now. Out, you're fired!"
Legend responded in a number of tweets, noting that the White House was "urging" firing people who fight for equality and justice.
"Trump is the opposite of a patriot," he wrote.
"Trump is only consistently loyal to white supremacists and Putin."
LeBron James called Trump a "bum" and pointed out that Curry had already said he wasn't joining his team the Golden State Warriors on their trip to the White House after winning the NBA championship this year.
Chance the Rapper, who was an outspoken supporter of Hillary Clinton in the 2016 election, said the headline on Twitter for James' response should actually be this: "President of US Challenges Black Athletes Freedom of Speech amidst World's End."
Trump fueled the fire — tweeting more about the NFL and criticizing the players for making millions.
"If a player wants the privilege of making millions of dollars in the NFL, or other leagues, he or she should not be allowed to disrespect.......our Great American Flag (or Country) and should stand for the National Anthem," Trump continued. "If not, YOU'RE FIRED. Find something else to do!"
The comments were a not-so-subtle jab to Kaepernick, who has famously taken a knee during the National Anthem before football games.
"Harry Potter" author J.K. Rowling pointed out the POTUS' use of the term "privilege."
"Some people don't get given millions by Daddy, Donnie," she wrote. "They actually earn it."
Nick Cannon flat out called the President the “anti-Christ.”
Director Ava DuVernay had several opinions on Trump, declaring that no one wants to be within a 10 mile radius of him and that he was "declaring war against black people with opinions."