Expect the unexpected as David Walliams attempts to shock Simon Cowell (will anyone risk a Dannii Minogue gag?) and producers attempt to stuff all 4,567 members of Only Boys Aloud on the stage. With child singers, dance troupes and animals all taking to the stage, we're bracing ourselves for some chaos. And hopefully a little bit of talent.
Join Digital Spy across the evening as we attempt to keep you abreast of all the drama and tears. There's bound to be plenty.
Britain's Got Talent launches at 8pm on ITV1.