TV hopefuls including a pensioner who combines impersonating Sir Sean Connery with chopping wood, a regurgitator and a cruise ship entertainer will battle it out for a place in the Britain's Got Talent final.
Eight acts including Bollywood dancers and acrobatic gymnasts will show off their skills in the first of five live-semi finals.
Almost 200 wannabes were selected for the London auditions but only 40 made it through to this week's climax of the ITV1 show.
Each night two acts will earn places in Saturday's grand final and the chance to become the next Diversity, which won last year's series.
The performance with the most public votes will go through automatically while judges Simon Cowell, Piers Morgan and Amanda Holden will pick their favourite out of the second and third most popular acts.
Actor Sean Sheehan, 66, from Anglesey, Wales, worked as an extra on films including Willow and Mortal Kombat and played Sir Sean Connery's double in First Knight.
He decided to create an act using his impersonating skills, singing voice and wood cutting abilities.
Fellow semi-finalist Stevie Starr - dubbed The Regurgitator - discovered his unusual talent when he moved into a children's home at the age of four and began swallowing his pocket money.
The other acts are 16-year-old singer Josh Barry, from London, who played Simba in The Lion King; London-based Bollywood dance company Threebee; Martin Cobble, 33, aka variety entertainer Kevin Cruise; dancer Tobias Mead, 22; Spelbound, a 13-strong group of acrobatic gymnasts from Ashford, Middlesex; and 14-year-old singer Olivia Archbold, from Newton-le-Willows in Merseyside.