Nathan Fillion at an event for Super (2010)

Nathan Fillion, James Gunn, and Rainn Wilson at an event for Super (2010)

Liv Tyler, Nathan Fillion, James Gunn, Elliot Page, and Rainn Wilson at an event for Super (2010)

Emily Deschanel and Nathan Fillion at an event for The 62nd Primetime Emmy Awards (2010)

Liv Tyler, Nathan Fillion, Ted Hope, and Michael Rooker at an event for Super (2010)

Liv Tyler, Nathan Fillion, and Michael Rooker at an event for Super (2010)

Rainn Wilson and Nathan Fillion try to answer the fan question, "Who would win in a fight, Dwight Schrute or Mal?"

Rainn Wilson and Nathan Fillion answer the fan question, "Who would win in a fight, Dwight Schrute or Mal?" Result: Dwight.

Liv Tyler, Nathan Fillion, Elliot Page, Michael Rooker, and Rainn Wilson at an event for Super (2010)

Liv Tyler, Nathan Fillion, James Gunn, Elliot Page, Michael Rooker, and Rainn Wilson at an event for Super (2010)

Vondie Curtis-Hall and Nathan Fillion in The Recruit (2022)

Dina Meyer and Nathan Fillion in Castle (2009)

Nathan Fillion and Stana Katic in Castle (2009)

Nathan Fillion and Alan Tudyk in An Alien in New York (2022)

Nathan Fillion and Alan Tudyk in Old Friends (2022)

Pete Davidson, Nathan Fillion, Sean Gunn, Michael Rooker, Joel Kinnaman, Flula Borg, Jai Courtney, Margot Robbie, and Mayling Ng in The Suicide Squad (2021)

Nathan Fillion and Mekia Cox in The Overnight (2020)

Nathan Fillion and Mekia Cox in Follow-Up Day (2020)

Nathan Fillion and Mekia Cox in Warriors and Guardians (2019)

Nathan Fillion and Richard T. Jones in Impact (2019)

Nathan Fillion, Richard T. Jones, Eric Winter, Alyssa Diaz, Melissa O'Neil, and Titus Makin Jr. in The Rookie (2018)

Nathan Fillion and Afton Williamson in The Rookie (2018)

Nathan Fillion and Eric Winter in The Rookie (2018)

Nathan Fillion, Sean Maher, and Afton Williamson in The Rookie (2018)

Adam Baldwin, Nathan Fillion, Gina Torres, Morena Baccarin, and Summer Glau in Serenity (2005)

Nathan Fillion and Summer Glau in Serenity (2005)

Vin Diesel, Nathan Fillion, Gina Torres, and Summer Glau in The Chronicles of Riddick (2004)

Keri Russell and Nathan Fillion in Waitress (2007)