Name: Libera
Age: 10 to 13 years old
Talent: Young male Choir
Background: Libera is made up of 13 young boys from a wide variety of backgrounds in South London. The boys don't think of themselves as choirboys, more of an alternative boy band. The group's three albums have topped both mainstream and classical charts in many countries. Libera have an enthusiastic fan base in many countries, particularly in the United States. They are currently looking forward to touring Japan and Korea.

Name: Captain Frodo
Age: 30
Talent: Contortionist
Background: Captain Frodo, real name Frode, is originally from Norway but now lives in Melbourne. Frodo began performing at the age of eight, alongside his father, a touring magician. It later became obvious that Frodo was naturally very flexible and, inspired by Houdini who started in magic and moved into escapology, he tried his first contortion - escaping from a straightjacket.

Name: Rubber Boy
Age: 27
Talent: Extreme contortionist
Background: Daniel's extraordinary skills was noticed at the tender age of four years old, when his father noticed his natural flexibility. His father encouraged him to explore his potential and brought home a book home on contortion, which Daniel worked through until he could perform all the moves.

At the age of 18, Daniel joined the Bindlestiff Shillabur circus where he learned more about the art. After various circus and sideshow tours, Daniel moved to San Francisco and trained under Master Lu Yi at the San Francisco School of Circus Arts. Daniel has appeared regularly on television and in feature films. He lives in California with his fiancée, who is a fire dancer.

This year Daniel has been entered the Guinness Book of World Records as the most flexible man in the world. He is the only person alive who can stretch his ribcage enough to show his heart beating in his chest.

Name: Richard and Peter Rayner
Age: 13 and 10
Talent: Drummers
Background: Richard and Peter were introduced to music by their father Mark, a bassist in a band that used to rehearse at their home. The brothers both picked up the sticks at around the same age, taking advantage of the drum kit that was around the house. Richard passed his grade eight drumming exam at the age of ten; Peter is taking his this month. Richard is also in two rock bands.

Name: David O'Mer
Age:
Talent: Aerial acrobat
Background: Born in Berlin, David has recently been touring Australia as part of La Clique, with whom he has been performing with for the last two years.

Unlike most gymnasts, David is taller than most at 5ft 11" (1.8m) and this would have normally stopped him following a professional career in the sport. However, it was his height that ensured that he stood out when acclaimed German director Markus Pabst was looking for a new act. Markus went on to create the 'bath act' especially for him. David watched videos of various strap acts and taught himself to do the tricks. He remembers plenty of occasions when he considered giving up, but he enjoys the crowd's reaction to his act.

Name: Chloe Bruce
Age: 23
Talent: Extreme Martial Arts
Background: Chloe became interested in the Tang Soo Do style of martial arts at the age of eight, when her younger brother joined a local club. By the age of nine, she was entering local competitions and at 11, she was awarded her black belt and gained a place in the Junior GB Team. By 16, she had three world titles under her belt and decided to move away from competitions and focus on a TV career. Chloe has travelled the world in pursuit of her dream, and has appeared in some small films and commercials.

Name: Wakefield Tumblers Age: Various
Talent: Acrobatic gymnastics
Background: The Wakefield Tumblers can cover 25m (7.6m) in under three seconds! There are 12 members of the team, six boys and six girls. Combining flips, handsprings, somersaults, even double and triple somersaults, they can reach heights of up to 12ft (3.7m) and have been known to tumble over people, furniture and even a Mini Cooper! This is a hugely visual and impressive sport, which is sure to wow both the live audience and those at home.

Tumbling is an amateur sport, but each gymnast still trains six days a week, for at least 20 hours. This year Wakefield will be travelling to New York, Quebec, Shang Hai, Russia, Poland, Belgium and France to compete.

Name: The Skating Aratas (winners Show Two)
Age: 18 and 17
Talent: High speed acrobatic tricks on roller skates
Background: Born in a traditional circus family, Vittorio and Emilia were only six and seven years old when they started performing with their mother and elder brother, Billy. At the age of 13, they left school to study abroad and work full time, and are particularly excited to be coming home to perform on the show. The sheer speed at which they perform their act is breath-taking. Look out for their signature trick, in which Emilia hangs onto her brother's neck - by her feet!

Show One contestants

Show Two contestants