One act hoping to impress both the judges and viewers at home was Mandy Muden.
The magician took to the stage in a leopard print wrap dress but as she walked towards the judges to begin her performance, her stunt double could be seen.
They were accidentally caught on stage carrying his wig, shows and handbag.
He was clearly trying to make a sneaky exit but unfortunately the cameras caught him leaving.
It was just one of many gaffes on Britain’s Got Talent this week.
Many of those tuning into the ITV series were quick to comment on the blunder.
“Don’t think they were supposed to show the stunt man taking his wig off on Mandy’s act #BritainsGotTalent,” one viewer wrote.
Another added: “Was… was that her bald body double shuffling off stage with his blonde wig in his hand like a s**t hamburlar.”
“Were we supposed to see the body double stumbling off stage, wig in hand #bgt #BGT2018 #BritainsGotTalent #BGTSemiFinals #BGTSemiFinald #bgtlive,” someone else wrote.