Former soap star Stephanie Davis has been arrested on suspicion of grievous bodily harm.
Police were called to a hotel in The Ridgeway, Enfield, at 11pm on Sunday night following reports of an assault.
Officers arrested a 24-year-old woman on suspicion of GBH, Scotland Yard said.
Police did not name the suspect but said in a statement: “She has been taken to a north London police station for questioning. The victim was treated at the scene and did not attend hospital. Enquiries continue.”
The ex-Hollyoaks actress has appeared on Big Brother’s Bit On The Side as a relationship expert during the current series.
She recently became a mother for the first time with on/off partner and former Celebrity Big Brother co-star Jeremy McConnell.
The couple first got together after appearing as fellow contestants on the reality TV show in 2016, months after Davis finished a five-year run playing Sinead O’Connor in Hollyoaks.
She first came into the public eye when she took part in the BBC talent-spotting show Over The Rainbow in 2010.
A representative for Davis has been contacted for comment.