Big Brother has been rocked by its first withdrawal as one of the twins decided to leave after less than a week in the house.
Victoria Jensen broke out of the house with her twin sister Emma on Friday night, in scenes to be broadcast on Saturday night.
A spokesman for the Channel Five reality show said: "Victoria has this morning decided to leave the Big Brother house, her twin sister Emma will continue as a housemate in Big Brother."
The twins were not the only ones to break out of the house on Friday, with model Marco Pierre White Jr, 20, and 48-year-old self-made millionaire and entrepreneur Chelsea Singh making a dash for freedom before returning.
The activity came after Friday night's broadcast saw two contestants evicted from the house - but remain contestants on the show.
This year's event contains a twist involving two houses, a "real house" as well as an "other house". Contestants dubbed The Others must fight to earn a place in the main house and cause as much mayhem as possible.
Alex Cannon and Jackson Blyton thought they had been permanently evicted from Big Brother during Friday's episode. But instead host Emma Willis let them in on a secret - they had been selected for eviction by the six "Others", and would actually be going into the "other house" rather than packing their bags to go home.
After their "eviction", she told them: "I can only imagine how gutted you must be ... We do need to let you into a little secret. You have lost your place as housemates, but you have not been voted out by the public."
The two were shocked as they headed into the other house, where the six "Others" were left reeling as they had been told by Big Brother that they were picking two people to send home.
A further surprise followed when "Other" housemates Andrew Tate and Ryan Ruckledge were told during the live eviction that they had been selected by public vote to fill Alex and Jackson's places as housemates.
But Emma warned them that they should not let on about the existence of the "other house", pretending that they do not know each other and have not seen any of the rest of the show.
She instructed the two men: "Your goal is to manipulate and take down."
Earlier on Friday a row broke out between housemates Natalie Rowe and Jayne Connery. The argument was sparked when Natalie took offence during a discussion about racism with Jayne, leading to a fiery confrontation in the garden.