ET has the latest…

"Gilligan’s Island" actress DAWN WELLS, who played good girl Mary Ann on the ’60s comedy, was arrested in Idaho for possesion of marijuana this past October. Wells was pulled over for speeding and cops smelled pot and found four partially smoked joints.

The drug charges were later dismissed. But the 69-year-old did plead guilty to reckless driving and was given six months probation.