Born and raised in Pouch Cove, Newfoundland, Jonny Harris has appeared regularly at The Halifax Comedy Festival, The Winnipeg Comedy Festival, and on CBC Radios The Debaters. He has appeared as both a stand-up and sketch comic at Montreals Just for Laughs Festival.  He has been a staff writer for the award-winning This Hour has 22 Minutes and was a contributing writer and star of Mary Walshs Hatching, Matching and Dispatching.  Jonny is a member of St. Johns sketch comedy troupe The Dance Party of Newfoundland, winners of the 2007 Toronto Sketch Comedy Festivals Best of the Fest award. Harris did a more dramatic turn for the dark indie film Grown Up Movie Star, with which he attended the 2010 Sundance Film Festival.  His stand-up special for Comedy Now! earned a Canadian Screen Award nomination.

He currently plays Constable George Crabtree on CBCs Murdoch Mysteries, for which he has garnered two Gemini nominations and a Canadian Screen Award nomination for Best Supporting Actor in a Dramatic Series. He also is a writer, producer and host for CBCs Still Standing, for which he has won 9 Canadian Screen Awards, including Best Host in a Factual Program/Series in 2017 and 2019. 

Murdoch Mysteries' seventeenth season, and Still Standing's ninth season, are both set to air in the fall of 2023.