Zacharia, who often appears as a guest on conservative media programs, previously had a brief stint as a spokesperson at the Department of Homeland Security from February to March this year. According to her LinkedIn profile, she has worked for Trump's media company and his Truth Social platform since June.
Former White House Press Secretary Karoline Leavitt, who left the White House in August, has reportedly taken a job with Fox News, though this has not been formally confirmed.
The White House press secretary role goes beyond the briefing room podium. The position involves managing contentious relationships with the press, coordinating with other parts of the White House, and providing media advice to the president. The office also receives a significant volume of inquiries and requests on a daily basis.
The BBC has contacted Zacharia for comment. No further details about the timing of the appointment have been released.