Jeanna Harrison was born in Halifax, Nova Scotia and grew up in the small town of Antigonish. She started acting at only 5 years old on the show Trailer Park Boys in the original black-and-white pilot program as Ricky's (alleged) daughter Trinity. After it was picked up by big-time producer Barrie Dunn, she continued to act on the popular Canadian television show, growing up (on the show), smoking, and driving around in the Shitmobile.

Jeanna attended Carleton University for engineering and Nova Scotia Community College for accounting, and now lives in Ottawa and works on Parliament Hill (as well as acting on Trailer Park Boys in her spare time).

As the series moves into the animation world in 2019, 26-year-old Jeanna still voices her character Trinity.