After the talented contestant finished performing an incredible piano recital for judges Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams, he was stunned to see his former music teacher Mr Morgan in the audience.
The 32-year-old previously revealed the pair have shared a special bond ever since Mr Morgan attempted to shelter him after his head teacher Philip Lawrence got stabbed to death in 1995.
And when he saw him in the audience for the first time since 2004, he was completely shocked and appeared to mouth "f**k me".
Ant said afterwards: “Apologies for any bad language you may have seen in that last interview.”
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Many people watching at home didn't catch the inaudible moment and took to Twitter to