Rory McGrath - best known as a panellist on the sports quiz They Think It's All Over - has been arrested on suspicion of assault following an incident in Cornwall, which left a man with a bloody nose and scratches on his face.
The incident happened at around 10.15pm on Friday.
A spokesman for Devon and Cornwall Police said: "Police were called to a property in the Pool area, near Redruth, following a report that a man had assaulted a male and female couple, who it is understood, were attempting to assist this man who was heavily in drink.
"A man in his late 40s received a bloody nose and scratches to the face. A 57-year-old man from the Cambridge area was arrested for common assault and an ABH assault.
"He has been bailed until 5 July while police carry out further enquiries."