The new company will include its major TV channels: Fox News, Fox Business Network, Fox broadcasting and sports networks FS1 and FS2. She went on to work on Trump's transition team before officially joining the White House communications team in January 2017.
The Hicks hire sent shockwaves through the Fox offices, surprising many.
Mr Trump is also reported to have a close relationship with host Sean Hannity, a leading cable news cheerleader of the president.
Interpol president resigns after being detained in China
Interpol said the senior vice president of its executive committee, Kim Jong Yang of South Korea, would become acting president. He had been on a three-country tour, to Norway, Sweden and Serbia, for Interpol before his latest trip back to China, she said.
During the nine-hour interview, Ms Hicks acknowledged that she had occasionally told "white lies" for Mr Trump, but she said she had not lied about anything relevant to the Russian Federation investigation.
It means she will supervise messaging at Mr Trump's favorite cable television network, the Rupert Murdoch-owned Fox News.
Fox, the media company formed in the wake of 21st Century Fox's sale to the Walt Disney Company, announced the hiring on Monday. When she left the White House, she was replaced by Bill Shine, who had been serving as Fox News's senior vice president.
Mahrez miss leaves City, Liverpool and Chelsea all level at top
That incident brought late drama, but after the thrills of the four meetings last season, this was something of an anti-climax. However, he had no complaints over referee Martin Atkinson awarding the spot-kick after Virgil van Dijk tripped Leroy Sane .
Those deals are expected to be completed in the first half of 2019, pending regulatory approval.
When NBC was owned by General Electric, the network's communications department had two heads who had worked in former President George H.W. Bush's administration.
Fox Chief Legal and Policy Officer Viet Dinh released a statement about the decision to hire Hicks and Danny O'Brien.
Brett Kavanaugh sworn in as 114th Supreme Court justice
That rare procedural manoeuvr left Kavanaugh with the same two-vote margin he'd have had if Murkowski and Daines had both voted. During the past two weeks, dozens of people who have known him came forward to support one version of Kavanaugh or the other.