Lemche was born in Brampton, Ontario to a schoolteacher mother and a father who was the proprietor of a heating business.[1] Lemche attended the Mayfield School of Arts. His brother, Matt Lemche, is also an actor.
At 17, he answered a newspaper casting call and won a role on the Disney series Flash Forward.
Abandoning plans to study biochemistry in University, he instead moved to Prince Edward Island to work on the CBC series Emily of New Moon. His work on the show earned him a Gemini Award. He tr