What alias did Mary Kay Bergman use in early South Park credits?

Mary Kay Bergman used the alias Shannen Cassidy in early South Park credits. She was credited under that name during the show’s first two seasons while performing most of its female voices.

The pseudonym combined the names of actors Shannen Doherty and David Cassidy. Bergman was already widely known as the official voice of Disney’s Snow White, and she worried that Disney might object to her involvement in South Park, an adult animated comedy with deliberately provocative material.

After South Park became a major success, the alias itself began attracting fan mail. Bergman eventually stopped using it, and later credits identified her by her real name. The other options are connected with South Park voice work or characters, but they were not Bergman’s early-credits alias.