Sunday Brunch star Simon Rimmer accidentally cut his thumb live on air.
The presenter, 57, was grating carrots on the Channel 4 show when the mishap happened.
Joe Sugg, who fainted on Celebrity Bake Off after accidentally slicing off the top of his finger, was on the show.
Rimmer told the YouTube star: “I don’t want to alarm you but I’ve actually just managed to grate my thumb.
“If we have got the standby team for when I faint!” he quipped to Sugg.
Co-host Tim Lovejoy chipped in: “I think you might actually need to put a plaster on that.”
YouTube star Sugg put his head in his hands and joked he was a “bad omen”.
Rimmer, before getting a plaster, continued his food preparation and told viewers: “So what I’m going to do is use spoons for everything now.”
Sugg was crowned star baker on last year’s Celebrity Bake Off, despite cutting his finger.