Casey Affleck's wife, Summer Phoenix, has filed for divorce from the actor after they publicly announced their split in March last year.

The 38-year-old actress-model, who shares sons Indiana, 12, and Atticus, 9, with Affleck, has asked for joint physical and legal custody of their children, according to court documents obtained by People magazine.

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Phoenix has also demanded spousal support.

The couple separated in November 2015 after 10 years of marriage. They were last seen at a public event together in 2014.

Affleck, 40, and Phoenix started dating in 2000 and welcomed their first child in 2004 before their marriage in 2006.