Michael Avenatti, the lawyer representing adult-film star Stormy Daniels, predicted Thursday that President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE’s eldest son, Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE, will be indicted on federal charges before his 41st birthday at the end of the year.

“Donald Trump Jr. will be indicted before his birthday on 12-31-18,” Avenatti said on Twitter.

“If you doubt my prediction, please check my record over the last 7 months,” the lawyer continued, adding the hashtag “#Winning.”

Donald Trump Jr. will be indicted before his birthday on 12-31-18. If you doubt my prediction, please check my record over the last 7 months. #Winning — Michael Avenatti (@MichaelAvenatti) October 11, 2018

Avenatti made a similar crack at Trump Jr. on Tuesday, also saying then that he will soon "be indicted" on federal charges.

The president’s son has been implicated in special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe into ties between his father’s 2016 presidential campaign and Russia.

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However, Trump Jr. said in an interview last month that he is not worried about potentially being incriminated in Mueller's investigation, though he has acknowledged the ongoing probe has been "very rough" for him personally.

“I’m not [worried] because I know what I did and I’m not worried about it,” Trump Jr. told ABC News at the time.

“That doesn’t mean they won’t try to do something,” he added.