Declan Donnelly hosts the first live semi-final of this year's contest, with the audition process having left judges Amanda Holden, David Walliams, Simon Cowell and Alesha Dixon with 40 acts to pick from. Tonight, eight of them will be performing live in the hope of impressing both the panel and the TV audience to win one of the two spots in the live grand final, where the winning act will receive a life-changing £250,000 prize and a spot at this year's Royal Variety Performance in November.

Britain's Got Talent Season 12 Episodes...

• s12e01 - Auditions 1
• s12e02 - Auditions 2
• s12e03 - Auditions 3
• s12e04 - Auditions 4
• s12e05 - Auditions 5
• s12e06 - Auditions 6
• s12e07 - Auditions 7
• s12e08 - Semi Final 1
• s12e09 - Semi Final 1: The Results
• s12e10 - Semi Final 2
• s12e11 - Semi Final 2: The Results
• s12e12 - Semi Final 3
• s12e13 - Semi Final 3: The Results
• s12e14 - Semi Final 4
• s12e15 - Semi Final 4: The Results
• s12e16 - Semi Final 5
• s12e17 - Semi Final 5: The Results
• s12e18 - Final

Britain's Got Talent Show Summary

Britain's Got Talent is a reality talent show hosted by Ant and Dec. Any sort of entertainment act is able to enter the competition and hopefully impress the judges and make it through to the final stages of the competition.

The series winner's prize is £100,000 and the chance to perform at the Royal Variety Show. The judges on the show are Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams.