Hicks was officially named White House communications director on Sept. 12, 2017, after filling that role in an interim basis since Anthony Scaramucci's departure in July.
She announced her resignation on Feb. 28, 2018, a day after testifying for nine hours before the House Intelligence Committee as part of its investigation into Russia's interference in the 2016 election.
"Hope is outstanding and has done great work for the last three years. She is as smart and thoughtful as they come, a truly great person," the president said in a statement.
Hicks had previously served in the role of director of strategic communications.
Hicks, a PR specialist, started working with Ivanka Trump in 2012. She became press secretary on Mr. Trump's campaign and then took on a similar role for his transition team.