David Arquette has completed rehab

David Arquette, 39, has been released from rehab.

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"He has completed treatment and has left the facility," his rep confirms to UsMagazine.com. The actor, who separated from Courteney Cox in October, checked into rehab on Jan. 2.

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"He is very committed to his sobriety and a changed person because of his experience," a source tells Us. "He realizes now how out of control things got and doesn't want that to happen again."

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The source also adds that Arquette has a support system ready and waiting. "His family is behind him 100 percent and visited him often in rehab."

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Now that the Scream 4 star has checked out, that doesn't mean his treatment will stop. "He plans on going to meetings everyday and is completely focused on what he has learned."