<Tr> <Th> Occupation </Th> <Td> Actor, voice actor </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 1993--present </Td> </Tr> <P> Nathan Christopher Fillion (/ ˈfɪljən /; born March 27, 1971) 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 . </P> <P> He has acted in traditionally distributed films like Slither and Trucker, Internet - distributed films like Dr. Horrible's Sing - Along Blog, television soap operas and sitcoms, and theater . Fillion has also voiced several video games, including the Bungie titles Halo 3, Halo 3: ODST, Halo: Reach, Destiny, and "Destiny 2", along with the 343 Industries video game Halo 5: Guardians . </P>

Who is the actor that plays richard castle