The 'You Raise Me Up' singer is happy in his relationship with the '2 Broke Girls' star and insists the fact they are in the same industry has nothing to do with why their romance works so well, as he loves her as a person.
He said: ''We're having a wonderful time and enjoying every minute of it.
''I don't think it's about being in the same industry. Kat could be a doctor or a pet psychic, she could be anything and she's just one of the kindest, most understanding people I've ever met, so really it comes down to who she is as a person.
''The fact we're both in the industry can be more of a challenge because we're always travelling and working. But when the connection is strong, you find ways to make it work.''
And the couple will spend more time apart in the coming months because Josh is keen to tour his new album 'Stages' - a collection of songs from musicals - in the UK and US.
He told HELLO! magazine: ''I want to take this album to some really amazing old theatres and there are plenty of those in England.
''I can't wait to hit the road.''