'Celebrity Big Brother' is back.
The reality TV show, now in its fourth series after moving to Channel 5, returned with a bang - and a live show - on Thursday night.
Page 3 model Lacey Banghard arrives at the launch of Celebrity Big Brother on Thursday evening.
Host Brian Dowling introduced the 12 'stars' who have accepted the isolating three-week challenge (in return for some much needed publicity and some cold hard cash) as they braved the cold to a mix of boos and applause.
See all their arrivals in the pictures below...
Celebrity Big Brother Launch
Celebrity Big Brother - Launch Night(01 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Heidi Montag and Spencer Pratt enter the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(02 of78)
Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(03 of78)
Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
MTV's "The Hills Live: A Hollywood Ending" Finale - Arrivals(04 of78)
HOLLYWOOD - JULY 13: Actor Spencer Pratt appear in costume across the street from MTV's 'The Hills' Live: A Hollywood Ending Finale at The Roosevelt Hotel on July 13, 2010 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(05 of78)
Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(06 of78)
Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(07 of78)
Heidi Montag and Spencer Pratt are sent to the Big Brother Basement at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(08 of78)
Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(09 of78)
Brian Dowling, Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(10 of78)
Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(11 of78)
Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(12 of78)
Claire Richards, Brian Dowling, Neil "Razor" Ruddock, Frankie Dettori and Rylan Clark at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(13 of78)
Neil "Razor" Ruddock arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(14 of78)
Neil "Razor" Ruddock arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(15 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(16 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(17 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(18 of78)
Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(19 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Lacey Banghard enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(20 of78)
Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(21 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Claire Richards enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(22 of78)
Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(23 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Claire Richards enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(24 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Rylan Clark enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(25 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(26 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(27 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(28 of78)
Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(29 of78)
Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(30 of78)
Lacey Banghard, Brian Dowling and Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(31 of78)
Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(32 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Lacey Banghard enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(33 of78)
Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(34 of78)
Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(35 of78)
Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(36 of78)
Lacey Banghard and Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(37 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Samuel Robertson enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(38 of78)
Sam Robertson and Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(39 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Samuel Robertson and Lacey Banghard enter the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(40 of78)
Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(41 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(42 of78)
Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(43 of78)
Brian Dowling and Gillian Tayforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(44 of78)
Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(45 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(46 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(47 of78)
Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(48 of78)
Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(49 of78)
Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(50 of78)
Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(51 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(52 of78)
Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(53 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(54 of78)
Brian Dowling and Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(55 of78)
Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(56 of78)
Brian Dowling and Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(57 of78)
Paula Hamilton arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(58 of78)
Paula Hamilton arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(59 of78)
Brian Dowling and Paula Hamilton arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(60 of78)
Paula Hamilton arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(61 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Paula Hamilton enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(62 of78)
Brian Dowling and Rylan Clark arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(63 of78)
Rylan Clark arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(64 of78)
Rylan Clark arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(65 of78)
Frankie Dettori and Rylan Clarke arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(66 of78)
Frankie Dettori arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(67 of78)
Frankie Dettori arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother Launch - London(68 of78)
Brian Dowling and Frankie Dettori arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(69 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori and Rylan Clark enter the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother Launch - London(70 of78)
Brian Dowling arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood. (credit:PA)
Celebrity Big Brother - Launch Night(71 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Presenter Brian Dowling kisses Rylan Clark before he enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(72 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(73 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(74 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(75 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(76 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(77 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Atmosphere at the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)
Celebrity Big Brother - Launch Night(78 of78)
BOREHAMWOOD, ENGLAND - JANUARY 03: Atmosphere at the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images) (credit:Getty Images)