Chris Evans was missing from his Radio 2 breakfast slot on Wednesday morning, leaving DJ Sara Cox to fill in for him.
The 51-year-old presents his morning show daily but was absent from the airwaves today.
Sara Cox, 43, revealed she was filling in for the redheaded radio DJ on her Twitter account.
‘On @BBCRadio2 brekkie in 15! One day spesh, come join me @RealLynnBowles @VassosA @justineclaire75 for top music & chit with added chat!’ she tweeted.