Christie Brinkley and John Mellencamp Split After a Year of Dating as Rep Says ‘They Vow to Remain Best Friends’

John Mellencamp and Christie Mellencamp have called it quits. (Photo: Getty Images)

Supermodel Christie Brinkley and singer John Mellencamp have split after a year of dating, a rep for the pair tells PEOPLE exclusively.

“Both the mileage between their homes and their heavy career demands interfered with their ability to maintain the relationship,” a rep for both Brinkley and Mellencamp tells PEOPLE. "They vowed to remain best of friends.”

Brinkley, 62, has been busy promoting her new line of Prosecco, Bellissima, this summer. Mellencamp, 64, has been touring this spring and was set to resume his American tour this summer.

In June, Brinkley spoke at length about her attraction to Mellencamp, saying she initially didn’t think they were a match when they first met at a Hamptons party in 2015.

“I thought, ‘Oh my gosh, we’re really opposites. He’s kind of a throwback from another time, like a silent cowboy,’” she told PEOPLE. “But then we talked and realized that we do have a lot of shared interests.”

But Brinkley said the two had bonded over their kids (she has three; Mellencamp has five, plus six grandkids) as well as their age.

"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?’” Brinkley said.

“When it comes to relationships, there is something nice about just being the same age.”

When asked if she thought the two might wed, Brinkley said they were keeping it light.

“You never really know what’s going to happen,” she told PEOPLE. “John and I are two people that have very full lives. We’re just trying to enjoy each other when we can see each other and try not to put too much [pressure] on it.”