'Celebrity Big Brother' presenter Davina McCall became a housemate for the first time after sneaking in to the house dressed as a chicken.
McCall has hosted the show for almost a decade but has never been a housemate.
She entered the house last night following the evictions of businesswoman Ivana Trump and glamour model Nicola Tappenden.
Glamorous Trump, who is best known for her marriage to US billionaire Donald Trump, was the first to get the boot.
Tappenden was later called to the diary room, still dressed in a chicken costume which she had been given earlier for a farmyard task.
Big Brother asked if she was enjoying her time in the house. When she replied that she was, Tappenden was told: “That’s too bad because it’s all about to end.”
The model, who removed her chicken feet before leaving, exclaimed: “I haven’t got my shoes on. I need my shoes.”
She was led barefoot out of a back door of the diary room and out of the house.
Tappenden told McCall: “That was mean. I thought I was going in to get my microphone changed or something.”
The model was not allowed to say goodbye to her fellow housemates but said: “I probably would have cried if I did say goodbye so it’s probably for the best.”
McCall then announced that she was climbing into Tappenden’s chicken costume and headed into the house to trick the celebrities.
After she went into the diary room, McCall said she was so nervous that she was shaking.
“I’m really frightened,” she told Big Brother. “Can I come and talk to you if I need to?”
The remaining housemates had no idea that Tappenden had left.
McCall was banned from speaking in the house so she did not draw attention to her real identity but Jones immediately guessed it was a trick, saying: “That’s not Nic.”
He said Tappenden did not walk like the person in the chicken suit and the housemates speculated that Trump had returned in disguise.
Speaking from the diary room, McCall told 'Big Brother’s Big Mouth': “They are terrorising me. They sussed me immediately.”
She added: “They were trying to carry me into the pen so they could make me talk.
“I thought at first they would rip my head off.”
Even though she was wearing Tappenden’s jewellery, McCall said it was easy to spot she was not the glamour model because she was “twice the width”.
McCall’s spell as a housemate ended shortly afterwards when viewers saw her appear on 'Big Brother’s Big Mouth' on E4, which was hosted on her behalf by Emma Griffiths.
The celebrities did not nominate this week and all the housemates were left at the mercy of the public vote, with viewers voting for who they want to win the show.
Trump polled the lowest number of votes.
Trump, who was a surprise addition to the house on the fifth day, smiled and blew kisses to the crowd as she left the house to a chorus of cheers.
She told McCall that she had bonded with some of the housemates and they would remain her friends for “a long, long time”.
Trump admitted a particular liking for Alex Reid, the cage fighter boyfriend of glamour model Katie Price.
“Alex is hot,” she told McCall. “He’s got a great body. He’s a nice guy.
“I exercise and he gave me motivation.”
She said she would like to meet up with Reid if she was in London.
Trump said she had become “really good friends” with actress Stephanie Beacham during their time in the house.
“She’s very grounded. She has a great sense of humour,” she said.
Trump did not seem shocked or disappointed that Beacham had nominated her for eviction last week.
She said the actress was probably trying to do her a favour as being in the house with a group of strangers was hard.
Trump tipped footballer turned actor Vinnie Jones to win the show, saying he was “a nice guy”, but said she expected the public vote to be close between him and singer Dane Bowers.
Tappenden, who won The Sun’s first Page 3 idol competition in 2002, is engaged to Crewe Alexandra midfielder Simon Walton and the couple have a one-year-old daughter, Poppy.
She said on her initial questionnaire that being on the show would be her greatest achievement.
Tipping Bowers to win, she said her time in the house had been “amazing”.
Jones, Bowers, Reid, Beacham and Jonas Altberg, aka Basshunter, are through to tomorrow’s final.