Former AFL star Ben Cousins has been released from prison 10 months into his one-year sentence. 

Cousins' father, Brian, collected his son from Acacia Prison in Western Australia on Wednesday morning after doing time in the facility for stalking an ex-partner. 

Cousins, who was eligible for parole in August but failed a drug test while on remand, was said to be smiling as he was being driven out of the facility, according to a Channel 7 reporter. 

The 39-year-old had been serving a sentence for violating a restraining order against Maylea Tinecheff, with who he has two young children while he was also caught driving on a suspended license in February last year, with police finding 8g of methamphetamine in his car.