Band of Voices, the singing group who impressed the judges enough to get an encore, will be bringing their sounds to the first live show, as will drag duo Bosom Buddies.
Dancers on the show will include colourful troupe Youth Creation and Martin Healey, who originally performed with a broom dressed as a nun.
Arisxandra Libantino, the 11-year-old who blew the judges away with her incredible voice, will be gracing the first semi-final, as will operatic singing brothers Richard and Adam, who almost brought the panel to tears with their version of 'The Impossible Dream'.
Philip Green will be bringing his range of impressions to the stage, and twin brothers J-Unity are also set to appear.
Aaron Crow, the magician and illusionist who shocked the judges with his dangerous audition, will also return to peform a routine that involves a bow, arrow and apple.
Who will you be voting for in the first 'Britain's Got Talent' semi-final? Let us know in the comments box below.