Nathan Fillion is an American actor best known for his role as Richard Castle in the ABC series, Castle

He is also famous for his role in the series, Firefly, and its big screen adaptation, Serenity, which has gained a cult following. 

He was born on 27 March 1971, in Alberta, Canada, to former English teacher parents, Bob Fillion and Cookie Fillion. 

He shifted to the United States in 1994 and has been an US citizen since 1997. 

He started his career in 1993, appearing in a TV film, Ordeal in the Arctic, and later appeared in series, One Life to Love

He made his big-screen debut in 1994 from the movie, Strange and Rich

From 2002 to 2003, he appeared as Malcolm “Mal” Reynolds in the series, Firefly, which later spawned the movie, Serenity. 

His most popular role came in 2009 in the drama series, Castle, for which he won three TV Guide Awards and four People’s Choice Awards.

He appeared in the show from March 9, 2009 to May 16, 2016, alongside Stana Katic, who played the role of Kate Beckett.

He has also appeared in movies and TV shows like Saving Private Ryan, Percy Jackson: Sea of Monsters, and Buffy the Vampire Slayer and many more.

He appeared in the web series, Con Man, from 2015 to 2017. 

He is set to appear as Jacques Snicket, in the season 2 of the black comedy drama, A Series of Unfortunate Events

He is an executive producer and the star of the new series, The Rookie, which is set to premiere sometime in 2018.

He is also set to appear in an upcoming movie, Nomis, in 2018. 

While appearing in ‘Castle,’ he was receiving $100k salary per episode. As of 2018, his net worth is estimated at $18 million.