Michael Therriault
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General Information
Full Name
  • Michael Therriault
  • Oakville, Ontario, Canada

Michael Therriault is a Canadian actor who plays Lord Castleroy on Reign.


Michael Therriault grew up in Oakville, Ontario and went to Etobicoke School for the Arts majoring in Drama. He has participated in many major Stratford Festival plays including major roles in Peter Pan and King Henry VI. He also played Tommy Douglas in a CBC Television special Prairie Giant: The Tommy Douglas Story. As well, he played Golum in a major theatrical production of Lord of the Rings, it opened in 2007 and closed in July 2008 after 492 shows!



Year Title Role
1992 Masala Bully #3
2012 If I Were You Rainer
Sunshine Sketches of a Little Town Billy Cole
I, Martin Short, Goes Home Teacher
Total Recall Bank Clerk
2013 Stranded Bruce
Silent Garden Theodor
The Grand Seduction Tripp's Assistant
Nurse 3D Anatomy Professor
2014 Forsaken Doc Miller
2015 Life Elia Kazan
Happily Ever After Dr. Mickelson


Year Title Role
1997 The Newsroom Mail Guy
2005 Time Warp Trio Thomas Edison
2006 Prairie Giant: The Tommy Douglas Story Tommy Douglas
2008 The Englishman's Boy Harry Vincent
2011 The Listener Dennis Thorpe
The Ron James Show N/A
2012 Haven Wesley Toomey
Copper Eugene Lunsford
2013 Call Me Fitz Jimmy
Murdoch Mysteries Mr. John Craig Eaton
2011-2013 Covert Affairs Andrew Hollman
2013-present Reign Lord Castleroy


  • Golum in the Lord of the Rings Musical