A woman has been cautioned by police for an alleged assault on EastEnders actor Steve McFadden.
The duo were among the soap's main characters in the 1990s
The arrest took place just hours after the wife of his co-star Ross Kemp - Sun editor Rebekah Wade - was freed without charge after an alleged attack on Kemp.
Mr Kemp told The Sun that the incident was "a lot of fuss about nothing".
Scotland Yard said Angela Bostock, 29, who allegedly attacked Mr McFadden, 46, was arrested outside her home in Haringey, north London, on Thursday.
She is the mother of the Mr McFadden's two children.
Police say they are not connecting the two incidents.
It is understood that the McFadden incident will feature on the Sun front page, with the headline: "EastEnders hardman beaten by lover".
The incident involving its editor is referred to at the bottom of the page, which reads: "And his bruv's had a bit of bother too".
Mr McFadden and Mr Kemp play brothers Phil and Grant Mitchell in the BBC soap.
Thirteen million people watched the long-awaited return of the actors to EastEnders last month, boosting the show's flagging ratings.
Scotland Yard said no further action will be taken against 37-year-old Ms Wade.
Ross Kemp and Rebekah Wade were married in Las Vegas in 2002
She was held after officers attended an address in south London at about 0400 GMT on Thursday, a police spokesman said.
Scotland Yard said Mr Kemp, 41, sustained a cut to the mouth but declined medical treatment.
"It was just a silly row which got out of hand," Ms Wade told Friday's edition of The Sun.
Mr Kemp and Ms Wade married in a Las Vegas ceremony in June 2002.
Ms Wade became the first female editor of the Sun - the UK's biggest-selling daily newspaper - in January 2003.
She was also editor of the News of the World between 2000 and 2003.
A spokesman for EastEnders declined to comment on the incidents.