20 Films You Didn't Realise Goonies Actors Were In
9. Mary Ellen Trainor - Back to the Future Part II
As already mentioned, Mary Ellen Trainor played Irene Walsh - Mother of Mikey and Brand - in The Goonies.
She also played a minor part in the second Back To The Future movie, as the investigating police officer Reese who answered to the house alarm in the future setting.