Hope Hicks, a 28-year-old former model, has been named as White House communications director, filling the role made vacant by the abrupt departure of Anthony Scaramucci.
The appointment, initially on an interim basis, was announced by the White House Tuesday morning (AEST), CNN reports.
Ms Hicks will become the youngest person to ever hold the position, which was left vacant after Mr Scaramucci was fired just 10 days into the job.
Ms Hicks was Mr Trump’s press secretary during the 2016 election campaign and has been working in the White House as a communications adviser.
A White House official told CNN that Ms Hicks will not move into the office that is allocated for the communications director, but will instead remain in her current space outside of the Oval Office.
Ms Hicks was previously a public relations professional for the Trump Organisation before becoming one of the first people to join the Trump election campaign press team.
A teenage model, Ms Hicks was photographed for several high profile campaigns include for Ralph Lauren and as the face of the Hourglass Adventures novels.
Her relationship with Mr Trump began while she was working for New York public relations firm Hiltzik Strategies.
Ms Hicks left Hiltzik Strategies to work for the Trump Organization on several projects, including Ivanka Trump’s fashion line and Trump resorts.
Given her longtime relationship with the Trump family, one White House official Ms Hicks as “untouchable” and another said she was the President’s “emotional support.”
Ms Hicks’ predecessor, Mr Scaramucci, was fired after his profanity-laced tirade against former chief of staff Reince Priebus and chief strategist Steve Bannon was reported in The New Yorker magazine.
– With agencies