Rylan Clark-Neal is to miss the next two weeks of It Takes Two in order to self-isolate.
Rylan, who co-hosts the show with Zoe Ball, will also be forced to temporarily step down from his Radio 2 show.
The presenter took to social media to say he has been in contact with coronavirus and will have to stay at home for fourteen days.
He wrote in a statement on Instagram: "I found out this week that someone I have been in recent contact with outside of work has tested positive for coronavirus.
"I am therefore now following the government guidelines and having to self isolate.
"I have sought a COVID test and thankfully that has returned a negative result.
"That does mean I will miss the next two weeks of Strictly It Takes Two and my BBC Radio 2 Saturday show.
"I look forward to being back soon and wish all the couples good luck for this weekend."
Gethin Jones will step in for Rylan on Thursdays and Fridays while Zoe Ball will continue to host the show Monday-Wednesdays.
The weekday sister show to Strictly, It Takes Two airs weekdays at 6:30PM on BBC Two and online via the BBC iPlayer.
Speaking about first joining the show last year, former X Factor contestant Rylan said: "I’m such a massive fan of Strictly, so I was overwhelmed when I got asked to be a host on It Takes Two. It came completely out of the blue!
"Originally I thought they were asking me to be a contestant – I thought 'no, I’m not doing it. I can’t go back into a competition!' But when they said it was presenting I had to ring Zoe to make sure I wasn’t taking her job! She said 'no, I’m cutting my time back a bit – I want you to do it!'"