To date, Hicks is the closest aide to Trump to contract the illness - spending significant time with him in the Oval Office and on the campaign trail - but she is not the first White House employee to do so.
Trump later tweeted that he and the first lady will begin isolating until they receive their results.
Trump took to microblogging website Twitter and said the two of them will begin their quarantine and recovery process immediately.
Mr Trump and his wife were already quarantining ahead of their test results after Hope Hicks, who regularly travels with the president on Air Force One had tested positive. Who knows", he said, adding "I spend a lot of time with Hope.
"She is as smart and thoughtful as they come, a truly great person", Mr Trump said.
"She did test positive", he said, adding, "she wears masks a lot".
Trump starts "quarantine process" after aide Hope Hicks tests positive for coronavirus
Ms Hicks was a campaign spokeswoman during Mr Trump's candidacy before becoming communications director in his White House. President Donald Trump has confirmed that he and first lady Melania Trump tested positive for the coronavirus .
"Whether we quarantine or whether we have it, I don't know", Trump said on Hannity.
Hicks accompanied Trump aboard Air Force One to and from the first presidential debate on Tuesday.
She was also aboard the President's helicopter, Marine One, for a trip to Joint Base Andrews yesterday.
"The president takes the health and safety of himself and everyone who works in support of him and the American people very seriously", deputy White House press secretary Judd Deere said in a statement that did not address Ms.
It is unclear where the Trumps or Hicks may have caught the virus, but in a Fox interview, Trump seemed to suggest it may have been spread by someone in the military or law enforcement in greetings.
Trump, the White House and his campaign have flouted other CDC guidelines and recommendations from public health officials, and largely refused to wear masks or practice social distancing.
Trump met with dozens of people through the week and reportedly went to a fundraiser in New Jersey after it was known Hicks had contracted the virus.
Trump tweeted out the surprise announcement in the early hours of Friday.
The White House released the president's Friday schedule earlier in the evening, confirming that he plans to travel to Florida for a campaign rally. Turns out he should have worn the mask he taunted Biden with during the debate. She tested positive. She's a hard worker.