Double, Double, Toil and Trouble is a 1993 telefilm, starring both Olsen twins, Mary-Kate and Ashley Olsen as Kelly and Lynn Farmer, respectively.
At a Halloween party, Kelly and Lynn Farmer (played by the respective Olsen twins) win at every activity, but end up having to share the wand they won as a prize, announced by Oscar the Clown.
Kelly and Lynn Farmer are the main protagonists of the film. They are the daughters of Don and Christine Farmer. Mary-Kate Olsen portrayed Kelly, and Ashley Olsen portrayed Lynn. Their respective actresses also played their aunts as little girls.
Aunt Sophia is the catalyst in the film. She is the aunt of the twins. Like her nieces, she is also a twin. She is the good twin who spends most of her appearances trapped in a mirror by her evil twin sister. Cloris Leachman (who portrayed her evil twin sister) portrayed her and Mary-Kate Olsen (who portrayed Kelly) also portrayed Sophia as a child.
Aunt Agatha is the main antagonist of the film. She is the evil twin sister of Kelly and Lynn Farmer. Like her sister, she was portrayed by Cloris Leachman.
Mr. N is the deuteragonist of the film. Meshach Taylor portrayed him.
Oscar is the tritagonist of the film. At the beginning, he acts as the clown at the Halloween party.
The Gravedigger is the one who digs graves. He is the one who explains the source of Aunt Agatha and Sophia's childhood separation to their great nieces, Kelly and Lynn.