Over the weekend, Donald Trump launched attacked NFL players who kneeled during the national anthem, labelling them “sons of bitches” and saying they should be fired.

Since then, numerous celebrities have derided the comments, including Stevie Wonder who ‘knelt for America’ while headlining a music festival.

Harry Potter author JK Rowling, a vocal critic of Trump, was quick to lash out at the President after he commented how players wanting “the privilege of making millions of dollars in the NFL” should not “disrespect” the national anthem.

The silver-tongued author commented: “’Privilege.' Some people don't get given millions by Daddy, Donnie. They actually earn it.”

Others to have publicly condemned Trump’s message include Oakland baseball player Bruce Maxwell who kneeled during the national anthem, becoming the first major league baseball player to take a knee.

Trump made the “sons of bitches” remark during a rally in Alabama, saying: “Wouldn’t you love to see one of these NFL owners, when somebody disrespects our flag, to say, ‘Get that son of a bitch off the field right now. Out! He’s fired. He’s fired!’”

The President continued: “You know, some owner is going to do that. He’s going to say, ‘That guy that disrespects our flag, he’s fired.’ And that owner, they don’t know it [but] they’ll be the most popular person in this country.”

Thousands march against Donald Trump in LGBT rights parade Show all 8 1 /8 Thousands march against Donald Trump in LGBT rights parade Thousands march against Donald Trump in LGBT rights parade A marcher hold a sign that reads "Love is Love is Love" on the National Mall with the Washington Monument in the background during the Equality March for Unity and Pride in Washington AP Thousands march against Donald Trump in LGBT rights parade Marchers unfurl a huge rainbow flag as they prepare to march in the Equality March for Unity and Pride in Washington AP Thousands march against Donald Trump in LGBT rights parade Marchers gather to hear speakers at the end of the Los Angeles LGBTQ #ResistMarch AP Thousands march against Donald Trump in LGBT rights parade Gil Mendez, of San Francisco, holds a sign to honor the victims of the shooting at the Pulse Nightclub in Orlando as he marches during the Equality March for Unity and Pride in Washington AP Thousands march against Donald Trump in LGBT rights parade An demonstrator looks on as LGBT members and their supporters take part of the Equality March for Unity AFP/Getty Images Thousands march against Donald Trump in LGBT rights parade A marcher listens to speakers at the end of the Los Angeles LGBTQ #ResistMarch AP Thousands march against Donald Trump in LGBT rights parade LGBT members and their supporters take part of the Equality March for Unity AFP/Getty Images Thousands march against Donald Trump in LGBT rights parade A marcher mugs for the camera during the Los Angeles LGBTQ #ResistMarch AP