Nathan Fillion played the role of Kevin Callis in "I Do."


  • Fillion is best known for playing Captain Malcolm Reynolds in Firefly and in the movie Serenity, as well as the villain Caleb in the final season of Buffy the Vampire Slayer. He is a favorite lead actor of Joss Whedon.
  • Fillion also played the antagonist, Captain Hammer, in Joss Whedon's web series Dr. Horrible's Sing-Along Blog.
  • Fillion also starred as Joey Buchanan in "One Life to Live" and Johnny Donnelly in "Two Guys, A Girl and a Pizza Place," both of which were also ABC series.
  • Fillion also starred as Alex Tully in the short-lived Fox series, Drive, executive produced by Tim Minear
  • Additionally, Fillion had a small role in the film Saving Private Ryan. He played Pvt. James Frederick Ryan, who was mistaken for Pvt. James Francis Ryan (Matt Damon) early in the movie. Jeremy Davies (Daniel Faraday) also had a role in "Saving Private Ryan" as Corporal Timothy Upham, the interpreter for Captain Miller's squad.
  • In 2009 he began playing the title role on the ABC drama Castle.


  • He shares a birthday with Elizabeth Mitchell.
  • In an episode of the show Firefly, Nathan Fillion's character Malcolm finds himself married to a criminal who has given him a fake name and drugs him in order to escape. ("Our Mrs. Reynolds")
  • In another episode of Firefly, Nathan Fillion's character helps someone who is in trouble with Fredric Lehne's (Marshal Edward Mars) Firefly character.
  • Nathan Fillion is the lead in movie sequel White Noise: The Light, following Michael Keaton's performance as the lead in the original "White Noise." Keaton was originally set to play Jack Shephard on Lost.
  • Nathan Fillion does the voice of GySgt Reynolds and GySgt Edward Buck in Halo 3 and Halo 3: ODST, respectively.
  • Nathan plays the recurring role of Adam Mayfair in another ABC series Desperate Housewives.