Miley Cyrus and Liam Hemsworth have reportedly split.

The couple - who have been dating since 2009 but separated twice in 2010 - have reportedly gone their separate ways after the former Hannah Montana star's partying ways became a "problem" for the Hunger Games actor.

"Miley and Liam are done; it's over. She likes to party really hard and can be pretty wild. It became a problem for him," one source said.

Another source added to the New York Post, "They have broken up before, and are broken up again now. There was drama because she suspected he had a wandering eye. And she recently tweeted a denial that he cheated. While Miley has insisted they are still together, right now they are very, very much apart."

Liam - who proposed to the 20-year-old singer-and-actress last March - recently flew back to his native Australia to escape his problems and spend time with his brother Chris Hemsworth and the actor's family, wife Elsa Pataky and nine-month-old daughter India Rose.