Hennessy was born in Edmonton, Alberta. Her father, John Hennessy, was a meat salesman and sales/marketing executive, a job that required considerable travel and resulted in frequent moves for the family. Her mother… See more

Hennessy and her sister, Jacqueline, made their acting debut playing twin call girls in 1988's Dead Ringers. She was short listed for the role of Dana Scully on The X-Files according to Gillian Anderson, the actress who eventu… See more

Hennessy is multilingual, and fluently speaks English, Italian, French, Spanish, and German. She plays the guitar and sings, and enjoys riding motorcycles with her husband who she married in 2000. They had … See more