© Rex Features / Ken McKay/TalkbackThames
> 'Britain's Got Talent' Top 40 In Full
> More 'Britain's Got Talent' news
Age: 21-27
Talent Dancing Fire Act
Formed in 2010, these six girls were chosen out of 300 auditionees to work as nightclub entertainers. The group's skills include stilt walking, dancing with fire and snake handling.
Age: 66
Talent: Animal trainer
66-year-old Donelda returns to the BGT stage with dogs Biba and Mega. The former hairdresser has been training dogs for 38 years and has performed at Crufts and various UK Championships.
Age: 27 & 19
Talent: Martial Arts
Chloe and Grace are sisters who have been doing martial arts from the ages of eight and three respectively. Chloe has a Guineness World Record for kicks and runs her own martial arts school.
Age: 19
Talent Pianist
Paul began teaching himself the piano at the age of 14 at his local church. His inspirations are Oscar Peterson, Chopin and Stevie Wonder. He can also play drums, guitar, recorder, steel pans, bass guitar and xylophone.
Age: 92 & 21
Talent: Singer
Retired army recruit and pop music fanatic Ted is the oldest act this year at 92. He will be performing with his granddaughter Grace, who studied police and criminal investigation at uni.
Age: 12
Talent: Singer
Norwich-based singer Ronan has been performing since he was three when he used to sing along to tracks in the car. His only live experiences has been at friends' birthday parties and classes of his peers.
Age: 42
Talent: Impressionist
Stuart began doing Arnold Schwarzenegger impressions in the '90s after watching family film Kindergarten Cop. He lives in Nottingham with his wife Karen.
Age: 19
Talent: Bike Act
Given his first bike at the age of 10, Joe was already competing in cycling contests at 13. He's competed in the world championships and still lives in Nottingham with his mum and dad.
Britain's Got Talent airs tonight at 7.30pm on ITV1
