Reported Missing Terminator Star Actually in Rehab

The 32-year-old actor was reported missing last week by his wife Rose -- but e-mailed friends yesterday to say he was okay and would be unreachable for the next 30 days so he could get help.

Stahl's wife, Rose, tells TMZ she spoke to the actor last night -- very briefly -- and he told her he checked into rehab. Rose says she double-checked with the rehab this morning to make sure he was still there -- and he was.

Rose tells TMZ she is not even thinking about divorce right now -- she is just glad he is safe. Rose says the couple's daughter has been asking about Nick's whereabouts lately ... and Rose is glad she can now say that daddy is safe and will be home soon.