who is the actor that plays richard castle
Nathan Fillion Nathan Christopher Fillion (/ˈfɪljən/; born March 27, 1971)[2][3] is a Canadian-American actor and voice actor best known for his role as Richard Castle on the ABC series Castle, as well as his earlier portrayal of the lead role of Captain Malcolm Reynolds in the television series Firefly and its feature film continuation, Serenity.