The first set of semi finalists attempt to impress the judges and viewers at home. Most of the acts manage to put in a good performance with only Stuart Arnold being buzzed by two of the judges during his performance. After all eight have performed the phone lines are opened for tonight's public vote.
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.
Britain's Got Talent - Series 5, Semi Finals 1 Synopsis and Schedule