Liam Hemsworth is the one who’s pulling the plug on his marriage, because TMZ has learned he just filed for divorce from Miley Cyrus.

Liam filed legal docs in L.A. … citing the standard “irreconcilable differences.”

Sources connected to the couple tell TMZ, Liam and Miley had a prenup, keeping their earnings during the marriage separate, so there won’t be a fight over money. And, since there are no kids, we’re told the divorce will be easy breezy.

The handwriting was on the wall for weeks … Miley and Liam announced their separation August 10, after less than a year of marriage. Our sources tell us Liam is “over the marriage” and just wants to move on.

[TMZ]