Fox News says Tucker Carlson breached his contract with Twitter show.

Tucker Carlson first grade teacher says his description of her in his book is "the most embellished, crazy thing I ever heard.”

Fox News notified Tucker Carlson’s attorneys on Wednesday that he breached his contract with his new Twitter show, according to Axios.

Carlson posted the first episode of his show on Twitter Tuesday, shortly after, Fox News general counsel Bernard Gugar sent a letter to Carlson’s attorney saying he was in breach of his contract.

“This evening we were made aware of Mr. Tucker Carlson’s appearance on Twitter in a video that lasted over 10 minutes,” Gugar wrote, according to the letter seen by Axios. 

“Pursuant to the terms of the Agreement, Mr. Carlson’s ‘services shall be completely exclusive to Fox,'” the letter continues, quoting Carlson’s contract.

“In connection with such breach and pursuant to the Agreement, Fox expressly reserves all rights and remedies which are available to it at law or equity,” the letter added.

Carlson was ousted from Fox News in April, less than a week after the network settled a defamation suit brought by Dominion Voting Systems for a record $787.5 million. But, Carlson’s contract with the network ends in 2025.

In a statement to Axios, Carlson’s attorney Bryan Freedman accused Fox News of violating his client’s First Amendment rights.

“Fox defends its very existence on freedom of speech grounds,” Freedman said. “Now they want to take Tucker Carlson’s right to speak freely away from him because he took to social media to share his thoughts on current events.”