The 30-year-old musician - who wed the fashion designer and former 'Made in Chelsea' star in 2013 - revealed the couple's hectic schedules mean they often work strange hours and get angry at each other for waking up at odd times.
Speaking at an exclusive gig at the Spotify offices in central London to launch their new integration with Uber, he told BANG Showbiz: ''When we do see each other it's one of us falling into bed extremely late at night and the other one waking up before the other one does but still disturbing the other one so the other one gets well p***ed off.''
Pro Green - whose real name is Stephen Manderson - doesn't see his partner very often because of their different careers, and hinted his wife has been even busier recently while training for ''a very specific reason'''.
He added: ''We're f**king busy and our careers don't align. We do very different things, so she's working on her clothing range at the moment, she's also just, oh I can't say, but she's been training hard for a very specific reason, and she's nailing it, and I'm busy doing what I'm doing.''
The star has also had a packed year working on his third album, 'Growing Up In Public', and is now looking forward to the festive season when he can enjoy a rare break and spend some quality time with Millie, 25.
He added: ''I think I've actually got a holiday, I've got a week's allowance, so it actually means we'll be able to spend some time together. It just means we make the most of the time we do spend together.''
Pro Green personally picked up some fans in Uber cars to take them to his exclusive gig in London to celebrate the taxi company's partnership with Spotify.
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