Essex band Loveable Rogues, elderly singing group The Zimmers and German impersonator Dennis Egel are among the list of acts to perform on Tuesday (May 8) night.
Contortionist Lucky, dance groups Area 51 and Twist & Pulse Dance Company and singer Honey Shazad will also perform.
Finally, 11-year-old singer Molly Rainford and xylophonist Ashley Elliott complete the lineup.
Ashleigh & Pudsey and Only Boys Aloud were the first acts to make it through to Saturday's live final on Sunday (May 6).
The Britain's Got Talent semi-finals continue tomorrow (May 8) at 7.30pm on ITV1.