According to one of Mellencamp's friends, the couple broke up "a couple of weeks ago."
Since the two began dating sometime in late 2010, they have kept their relationship private, so it's no surprise it's been a few weeks since the two split with no word. The couple began their relationship following Mellencamp's separation from his wife of 18 years, Elaine Irwin Mellencamp.
The Sleeping in Seattle actress and Mellencamp, 62, split their time between the East Coast and in Indiana, Mellencamp's longtime home.
— HELLO! (@hellomag) August 22, 2014
Opinions differ on why the couple broke-up.
"It was the distance," a source told People magazine. "She lives in New York and he resides in Indiana. It was the long distance that ultimately was the cause."
Mellencamp apparently didn't take to the big city.
"I'm too sensitive to live there," he told Rolling Stone in December. "I can't see poor people. I can't see the suffering. I can't see the trash on the streets." When it comes to paparazzi attention, he added, "I don't like it for [Ryan]. "I'm not leaving Indiana. I'm going to die here."
— Us Weekly (@usweekly) August 21, 2014
However, Mellencamp's friend believed there were other, more personal reasons.
"I don't think he loved all the attention he got just from dating an actress," the friend told Closer Weekly. "I bet he'll stay away from dating another famous person for a while."
Ryan, 52, is currently directing Ithaca, an adaption of William Saroyan's novel The Human Comedy. The last time the actress appeared before the camera was in 2009's Serious Moonlight.
As for Mellencamp, he has a new album, Plain Spoken, slated for release next month.