Name: Micky P Kerr
What is his act: The stand-up comedian plays his guitar while he sings witty lyrics.
Memorable moment: Simon Cowell was left baffled when he sang about 'bags for life' because he didn't know the difference between supermarket carrier bags. David Walliams then quipped the music mogul wouldn't know because he hadn't stepped foot in a supermarket since 1981.
Other notable achievements: The Edinburgh Comedy Festival when he performed at the 2017 Fringe.
Name: Lee Ridley or Lost Voice Guy
What is his act: Stand-up comedian
How does he do it: The comedian, who suffers from a neurological condition cerebral palsy which renders him unable to speak, entered his jokes on his iPad.
Memorable moment: Poking fun at the automated voice from his iPad, he closed the comedy skit with: 'I know you've been trying to figure out where you know my voice form, maybe it would help if you here this: "The next train to arrive at platform 4 is the 12:52 to London's Kings Cross".'
Amazing achievements: In 2014, he won the BBC New Comedy Award.
Name: Giang Quoc Nghiep and Giang Quoc Co
Stage name: Giang Brothers
Where are they from: Vietnam
What is their act: They are brothers and circus performers who put on a high-risk balancing act which sees Nghiep balance on top of his sibling's head.
Memorable moment: Viewers and audience alike watched in horror as they walked backwards up the stairs during their dangerous balancing performance.
Other notable achievements: The pair broke the Guinness World Records for the 'most stairs climbed while balancing a person on the head'.
Name: Robert White
What is his act: Stand-up comedy
Memorable comments: The comedian joked Alesha Dixon looked like a hooker and he called 47-year-old Amanda Holden old during his skit which secured him a place in the final.
Controversial side note: The finalist could be seen being shoved by rapper Big Narstie during live television when the musician reportedly took the joke the wrong way.
Name: DVJ or