Christie Brinkley and John Mellencamp have split up.

Christie Brinkley

Christie Brinkley

The 62-year-old supermodel and the 64-year-old singer have ended their relationship after around one year of dating, citing their "heavy career demands" as the reason for the split.

A representative for the pair told PEOPLE magazine: "Both the mileage between their homes and their heavy career demands interfered with their ability to maintain the relationship. They vowed to remain best of friends."

The news of their split may come as a bit of surprise to most as Christie recently revealed she had been working hard on her romance with the 'Hurts So Good' hitmaker.

She said: "We're just trying to enjoy each other and not try to put too much pressure on it. You never really know what's going to happen. John and I are two people that have very full lives. It's always nice to hear that someone is interested."

Meanwhile, Christie previously admitted she thought they were "opposites" when they first met.

She shared: "I thought, 'Oh my gosh, we're really opposites. He's kind of a throwback from another time, like a silent cowboy.' But then we talked and realised that we do have a lot of shared interests. I know guys that go out with girls that are so, so young. They'll throw some reference out, and they're like, 'What's that?' When it comes to relationships, there is something nice about just being the same age."

And whilst Christie prefers being in a relationship with someone her own age, she recently revealed she finds it hard to find love with someone whose at the same stage of their life as she is.

She added: "It seems like during this period that most of the guys are like 38, 39, 42, like that sort of age group. It's funny because I think that at that age they have nothing to prove. They're very confident and do just what they want to do. [With] men my age I feel quite invisible to them. I think a ten-year span is fine."