Torrance Coombs (born June 14, 1983) is a Canadian-American actor. He is known for his role as Thomas Culpepper in The Tudors (2007-2010) and as Sebastian "Bash" De Poitiers, half-brother of Francis (Toby Regbo), and son of King Henry (Alan Van Sprang) in the CW drama series Reign (2013-2017).