The couple say their son is a fan of Metallica, The Beatles and AC/DC and that he can already tell the difference between Bon Scott's voice and that of Brian Johnson.

Ian tells Horns Up Rocks: "He knows a lot of the stuff that he hears or sees in the house. But what's really cool is that he actually recognises and knows the difference between Bon Scott and Brian Johnson, which is pretty cool I think for an almost three-year-old.

"Anytime AC/DC is on he'll go 'that's Bon singing'. And then when it's not Bon, he'll say 'that's not Bon singing'. He knows, that's pretty cool I think."