Brantley Gilbert and Jana Kramer have called off their engagement, according to People magazine.

A source tells the magazine, ""They are both on the road and have to spend a lot of time apart, which isn't ideal for any couple, let alone a couple trying to plan a wedding."

The two young stars are both touring heavily on separate tours this summer.

Gilbert and Kramer started dating late last summer.  Kramer was previously married to Johnathon Schaech for a month in 2010.

Sources say, "No foul play" was involved.