Say it ain't so, folks!
Distance was reportedly a factor in the decision. The 52-year-old actress lives in New York City, while the 62-year-old rocker currently resides in Indiana.
The pair quietly became an item in 2010 after Mellencamp split from his wife, Elaine Irwin, after 18 years of marriage. Ryan was previously married to The Rookie actor Dennis Quaid.