Girl Scouts Leave Mary Ann Stranded

Dawn Wells' arrest for pot possession is no laughing matter -- the "Gilligan's Island" star has been dropped from speaking at a Girl Scout event in Palm Beach because of it!

Although a third party claimed responsibility for the marijuana, the Girl Scouts of the Palm Glades Council have nixed Dawn from speaking at their April 5 luncheon in Palm Beach. TMZ spoke with Holly Policy, a Scout spokesperson (who found out about Dawn's arrest by reading TMZ), who said, "We didn't feel it was appropriate for her to speak under the circumstances."