The Walt Disney Co.is expected to complete its $71.3 billion acquisition of Fox's entertainment and media assets next year, leaving Fox with news and sports at its primary focus. New Fox includes 21st Century Fox television stations - including Fox News.
Hicks will move to Los Angeles to start her new role once the sale is finalized with Disney. "Together they will define and project Fox's voice to our relevant communities", said Viet Dinh, the company's chief legal and policy officer.
Hicks, 29, joined the Trump administration in January 2017 after working as press secretary and communications adviser to Trump's 2016 presidential campaign.
While her role at the White House was mostly behind the scenes, she was one of Mr Trump's most trusted aides and had worked for him at his real estate company before he was elected.
It's not unusual for communications executive, trained in the crucible of Washington, D.C., to land jobs in Hollywood.
"So happy for my friend", she tweeted. O'Brien was previously chief of staff for Democrats Joe Biden and Robert Menendez.
The former model also reportedly acknowledged during the committee hearing that she told "white lies" on behalf of Trump, an admission that would cast doubt on future statements on behalf of the White House. He was most recently an executive at General Electric.