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Actress files for Thicke divorce

Paula Patton has filed for divorce from Robin Thicke and is asking for joint custody of their son.

The Precious and 2 Guns actress filed for divorce from the Blurred Lines and singer in Los Angeles, citing "irreconcilable differences".

The couple (below) announced they were separating in February after nine years of marriage. They have a 4-year-old son. Patton was the inspiration behind much of Thicke's music and appeared in his videos.

The crooner's latest album, Paula, sold only 24,000 units in the US when it was released in July. Thicke's previous album, Blurred Lines, sold 177,000 when it debuted last year.