Acts go through pre auditions before they get to perform for Simon Cowell, Amanda Holden, Alesha Dixon, KSI and Bruno Tonioli in front of a live audience, facing six hour waits just to get in the building on the day.
The live TV show stage isn't the first time the contestants will perform their routines at Britain's Got Talent, according to street dance act Twist and Pulse, who found their pre-auditions useful practice.
Ashley Glazebrook and Glen Murphy were winners of Britain's Got Talent: The Champions in 2019 and Ashley told the Daily Star: "You have a producer round first where you have to perform in a room with a little tiny TV and I remember it was really awkward".
"I feel like it is as you see on TV, there's a lot of waiting around and you know when you see the shots of people queuing up and they look like they are there for hours and hours, well it is all real and you actually do have to queue in those," said Twist and Shout's Glen.
Head judge Simon Cowell is wearing red lens spectacles on this year's Britain's Got Talent due to a battle with migraines, a condition causing painful headaches that affects 10 million people in the UK.
