Roxanne Pallett has left the Celebrity Big Brother house, Channel 5 has said, following an episode in which she was "punched" by housemate Ryan Thomas.
The former Emmerdale actor's exit comes after media watchdog Ofcom received thousands of complaints. Many are understood to focus on her reaction.
Pallett, 35, said the former Coronation Street actor hurt her.
But Thomas said there was no "malice" in what happened, with some viewers arguing it was merely play-fighting.
Pallett complained to the show's producers about Thomas's behaviour and Big Brother bosses issued him with a formal warning for physical contact.
A Celebrity Big Brother spokesman told the BBC: "Roxanne has decided to leave the Big Brother house.
"The remaining housemates have been informed."