Emily Parr has been removed from the Big Brother house for using a racially offensive word to another housemate.
The 19-year-old from Bristol was taken out of the compound at 0330 BST and was forbidden from having any further contact with the 11 other contestants.
This week's eviction vote has been suspended, in which Emily was nominated along with Shabnam Paryani.
A spokeswoman for Channel 4 said that the decision had been taken because "such behaviour won't be tolerated".
Channel 4 said the offensive term was not broadcast in the programme during a live stream, and was immediately reported to senior production staff.
Emily said: "Are you pushing it out, you nigger?" to Charley Uchea, while they were dancing in the living room on Wednesday evening.
In consultation with broadcast executives, the decision was taken to remove Emily from the house because she had breached rules governing contestant behaviour.
This includes causing serious offence based on the grounds of race.
Angela Jain, head of the Big Brother commissioning team, said: "The word nigger is clearly racially offensive and there was no justification for its use."
She added: "She [Emily] understands why her involvement has come to an end and she very much regrets what she said.
"I think people watching the show tonight will agree that Emily spoke carelessly rather than maliciously - certainly Charley and Nicky, the two housemates most directly involved in the conversation with her, seemed to accept that she did."
Ms Jain said that the decision had been taken in the wake of the alleged racist bullying of Bollywood star Shilpa Shetty on Celebrity Big Brother earlier this year.
The broadcaster was censured by media watchdog Ofcom and ordered to make a series of on-air apologies for the incident which prompted a flood of complaints.
Source: BBC News
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