Jedward and Katona in BB house
Jedward and Kerry Katona are the biggest names in the Big Brother house as the reality TV show switched to a new home on Channel 5.
The show also has a new host after regular C4 host Davina McCall bowed out.
Brian Dowling, who won the show in 2001, welcomed viewers with the words: "The waiting is finally over. Your Big Brother is back with a bang."
Katona, wearing a strapless black dress, told Dowling: "I'm shaking like a leaf. I'm really, really nervous." After she went inside, Katona was heard to exclaim: "Bloody hell, this is lovely! Wowee."
American Pie actress Tara Reid was the next housemate to arrive, wearing a short black dress and high heels. Reid, who is reported to have got married earlier this month, was asked by Dowling if this was her honeymoon. "Let's find out," she said, adding that she was "a fun girl" before heading inside.
Paddy Doherty, of Channel 4's My Big Fat Gypsy Wedding, was next in. "I'll just see how it goes," he said when asked how he would cope living under the control of Big Brother. "I'm just here for the craic."
Glamour girl Amy Childs, from ITV2's The Only Way Is Essex, was the fourth housemate to arrive, wearing a sparkling strapless dress.
Photo agency boss Darryn Lyons arrived next, wearing a gold jacket and trousers and with his Mohican haircut dyed fuchsia pink. Lyons claimed that beneath the flamboyant exterior he was shy but warned he did not suffer people he did not like.
Sally Bercow, the wife of House of Commons Speaker John Bercow, admitted her husband did not entirely approve of her decision to take part. "He's not exactly chuffed about it," she told Dowling. "He wasn't very pleased but he does know what I'm like. He respects the fact that I do my own thing."
Lucien Laviscount, who played Sophie Webster's love interest, Ben Richardson, in Coronation Street, said he hoped people would think he was "a cool guy". David Hasselhoff's former wife Pamela Bach Hasselhoff, who also starred in Baywatch, danced to the show's theme tune on the runway before entering the house.