Jana Kramer and Johnathon Schaech

One Tree Hill star Jana Rae Kramer and Johnathon Schaech have called it quits — after only one month of marriage.

Johnathon Schaech weds One Tree Hill's Jana Rae Kramer

"Jana and Johnathon have agreed to dissolve their marriage," Kramer's rep, Janice Lee, tells TVGuide.com. "Jana is humbled by the outpouring of support from her fans, friends and family, and appreciates the respect of her privacy."

On Monday, Kramer tweeted that she was having "a tough day." "I love my friends," she added.

Schaech, 40, and Kramer, 26, married July 4 in her home state of Michigan. They met while filming Prom Night in 2008 — one year after Schaech divorced Christina Applegate.

An e-mail to Schaech's rep was not immediately returned.