Michelle Branch has reportedly filed for divorce from her husband Teddy Landau, after separating more than a year ago. 

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Branch and Landau had been married for nearly 11 years, TMZ reports. The singer-songwriter cites "irreconcilable differences" as the cause.

The gossip website reports that Branch filed the paperwork without a lawyer -- suggesting an amicable split -- and said she wants joint custody of their 9-year-old daughter, Owen Isabelle.