Andy Dick Arrested -- Allegedly Wasted In Public

5/3/2011 6:05 AM PDT

Andy Dick Arrested -- The Mug Shot

The downward spiral continues ... Andy Dick was arrested at a restaurant in Temecula, CA last night after cops say he was acting disorderly ... while under the influence of drugs or alcohol.

The former "Celebrity Rehab" star was taken to a nearby jail ... where he was booked at 9:48 PM. Bail was set at $500.

Story developing ...