Paul Blackthorne (born 5 March 1969) is an English actor. Although born in Shropshire, he spent his early childhood on UK military bases in Britain and Germany.

Blackthorne broke into acting via television commercials in England. His breakthrough commercial in the UK came in the Grim Reaper commercial for Virgin Atlantic, which was hugely successful. Numerous radio commercials followed.

Blackthorne's first film role was in the Academy award nominated Bollywood film Lagaan, released in the year 2001. Since then, he has mostly appeared in American films and television shows. He had recurring roles in the American series ER and 24, both in 2004, and has been a regular cast member in the series The Dresden Files (2007), in which he played the title character of Harry Dresden, as well as Lipstick Jungle (2008–09) and Arrow (2012–2018).