Hope Hicks has reportedly become the youngest person ever to be appointed White House communications director.

CNN reports the former model, 28, who has been filling the role in an interim position since the sudden departure of Anthony Scaramucci, has been given the job on a permanent basis.

Hicks will be the third person to fill the role full-time since Trump took office in January, following Mike Dubke and Anthony Scaramucci.

Anthony Scaramucci was Whie House communications director for 10 days. Photo / AP
Anthony Scaramucci was Whie House communications director for 10 days. Photo / AP

Campaign spokesman Jason Miller was slated for the job following the election but he bowed out in December citing family reasons.

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Former Press Secretary Sean Spicer filled in on communications duties while the slot was open earlier this year.

Hicks is a long-time Trump aide who was a prolific teen model and was brought into the Trump organisation in August 2014 by Ivanka Trump.

Hicks was Trump's press secretary during the election campaign.

In a February 2016 New York Times piece, Trump said she was invaluable.

"She's got very good judgment. She will often give advice, and she'll do it in a very low-key manner, so it doesn't necessarily come in the form of advice. But it's delivered very nicely," he said.

Sean Spicer filled in on communications duties earlier this year. Photo / AP
Sean Spicer filled in on communications duties earlier this year. Photo / AP