The winner of Britain's Got Talent has revealed that a stunt double dog walked the tightrope on last night's show instead of Matisse.
Although the act was billed as 'Jules O'Dwyer and Matisse' and the audience believed the dog to be Matisse, O'Dwyer revealed that Matisse "is afraid of heights".
She told ITV show Lorraine: "Matisse is a little bit afraid of heights so although he could physically do it Chase is the dog who says 'I'm the action dog'. He plays the double for him."
Jules O'Dwyer and Matisse beat Welsh choir Cor Glanaethwy and magician Jamie Raven to win the £250,000 prize.
O'Dwyer appeared on Lorraine this morning and revealed that the winning sketch, in which O'Dwyer played a policeman and Matisse a dog who had stolen sausages, had actually included three dogs.
A three-legged dog called Skippy appeared at the end of the sketch but a middle segment included a tightrope walk which looked as though it had been completed by Matisse but was actually performed by Chase.
O'Dwyer added: "The tightrope takes months of training. It takes a special rigging system. It takes professionals to help you.
"BGT were fabulous. Our team said what we needed to pull this off."
O'Dwyer and Matisse will perform at this year's Royal Variety Performance.
Last night's final drew an audience of 13.4m, making it the highest rating show on TV so far.
However, earlier in the series the show sparked controversy over another dog act - Marc Matel and his 'talking' dog Wendy which prompted complaints from viewers who worried the dog was muzzled in a cruel way.
However, following an investigation the act was deemed safe and Wendy made it to the BGT semi-finals.