Ellen DeGeneres tests positive for COVID-19

SANTA MONICA, CALIFORNIA - NOVEMBER 15: 2020 E! PEOPLE'S CHOICE AWARDS -- In this image released on November 15, Ellen DeGeneres accepts the award for The Daytime Talk Show of 2020 onstage for the 2020 E! People's Choice Awards held at the Barker Hangar in Santa Monica, California and on broadcast on Sunday, November 15, 2020. (Photo by Christopher Polk/E! Entertainment/NBCU Photo Bank via Getty Images)

Ellen DeGeneres has tested positive for COVID-19.

The American TV host posted on Instagram on Friday (NZ time) to reveal her diagnosis.

"Anyone who has been in close contact with me has been notified," she wrote.

"I'll see you all again after the holidays. Please stay healthy and safe."

The 62-year-old said she was "fortunately feeling fine".

DeGeneres has made headlines this year after allegations surfaced of a toxic workplace on the set of her talk show The Ellen Degeneres Show. 

WarnerMedia bosses ordered a formal inquiry into complaints from staff members past and present about their treatment behind the scenes of the show after dozens of staffers alleged they had been bullied, belittled or sexually harassed. 

DeGeneres publicly apologised on air, saying she was "disappointed" people had experienced poor treatment. 

"I told everyone in our first meeting that The Ellen DeGeneres Show would be a place of happiness - no one would ever raise their voice, and everyone would be treated with respect," she wrote.