The 26-year old actress — who voiced the role of Honeymaren in “Frozen 2″ — revealed in a series of posts on her Instagram story that she has been under quarantine for the past week due to the illness.

“Hey guys, I tested positive for COVID-19 and have been in quarantine the last week,” Matthews wrote.

“Unsure of what the next step is (been getting mixed info so will keep you posted) but obviously will remain in quarantine until told to do otherwise.”

Matthews, who also starred in the Hulu series “Looking For Alaska,” explained how the symptoms changed over several days and said the tests are “INSANELY hard to come by.”

“Our country is very behind, and we don’t have much of a system in place,” she wrote. “I only got tested because I had been around a confirmed case and had been showing symptoms.”

She reminded her followers to “Rest, drink lots of liquids and SELF QUARANTINE.”

“I will be posting some info that I hope will be helpful to some,” she said. “Please feel free to reach out and ask me any questions.”