"HawthoRNe" star Abigail Spencer -- who played Dr. Erin Jameson on the show -- has filed for divorce, TMZ has learned.
Abigail filed the docs in L.A. County Superior Court, citing "irreconcilable differences."
According to the docs, Abigail and her husband Andrew Pruett married in 2004. They separated back in August after seven years together.
Based on the papers, the split was pretty amicable -- with Abigail asking the court to grant her hubby joint legal AND physical custody of their 3-year-old son.