Nick Stahl is missing again

Troubled actor Nick Stahl has gone missing again after checking out of rehab against his doctor's advice.

The "Terminator 3: Rise Of The Machines" star first disappeared for more than a week last month but he re-emerged and was admitted to a rehab clinic.

RELATED: Demi Lovato: A Year Since Rehab

Stahl, who has battled a drug problem, walked out of the California center earlier this month and went to stay at a pal's house.

RELATED: Julia Roberts on Fame: 'There's the Express Elevator and There's Rehab'

However, his family and friends are once again searching for Stahl after he failed to return to his friend's home. He was last spotted on Thursday.

A source tells EOnline.com, "Now he's disappeared. We can't find him anywhere. He has not made contact with anyone. We are all just desperately looking for him."

RELATED: Nick Stahl Check Out of Rehab

"Everyone just wants him to come home. It's a terrible situation. We are searching, but we've had no solid leads."