Kate Walsh KWalsh112407_05_X17.jpgarchive photo

Aww, no wonder we've been seeing Kate Walsh solo lately!

The Private Practice star is splitting from her husband of 15 months, Alex Young. According to Entertainment Tonight, Young filed for divorce on November 22, 2008, citing irreconcilable differences.

The couple got married in September of 2007 after being engaged for a few months.