Producers have held Open Auditions around the UK, but due to unforeseen demand have announced one final date at London's Oval on Saturday, January 19.
The famous cricket ground will open its doors to auditionees of any age, background or talent.
Last year's Open Auditions at The Oval helped producers discover eventual semi-finalists Hope Murphy and Billy George. Around 6,000 acts turned up on the day to try out for the show.
[Pictured: Hope Murphy and Billy George]
Matt Banks, series producer of Britain's Got Talent, said: "We've already seen thousands of acts but we want to make sure we find the best talent around and this Open Day allows even more people to audition."
Acts who wish to enter can register to audition at www.itv.com/talent or just turn up on the day.
Simon Cowell, Alesha Dixon, David Walliams, Amanda Holden and hosts Ant & Dec will all return for the 2013 series of the ITV talent show.