Kirk is a classically trained actor with a remarkable talent for versatility, boasting an impressive 30 on-stage performances and a staggering 170 film and television credits to his name. He has had the privilege of starring in numerous independent features, including The Best Christmas Pageant Ever (2024),Woodlawn (2015),Like Dandelion Dust (2009),Midnight Clear (2006),Hometown Legend (2002),Urban Justice (2007),The Lucky Ones (2008),and The Least of These (2008).
His remarkable performance in A.I. Artificial Intelligence (2001) caught the attention of none other than Steven Spielberg himself, leading to a substantial offer for his film Minority Report (2002). In addition to his work on indie films, Kirk has also appeared in a range of studio productions, including Swordfish (2001),opposite Don Cheadle, Flightplan (2005),opposite Sean Bean and Jodie Foster, Wolfgang Petersen's Poseidon (2006),Clint Eastwood's Flags of Our Fathers (2006),and Resident Evil: Extinction (2007).
On television, Kirk has played series regular and recurring characters on The Chosen (2017),The Event (2010),The Unit (2006),E-Ring (2005),Over There (2005),Charmed (1998),Strong Medicine (2000),The X-Files (1993),and NYPD Blue (1993). He has also had the opportunity to guest star on numerous hit shows, including NCIS (2003),Criminal Minds (2005),Bones (2005),CSI: Crime Scene Investigation (2000),Big Love (2006),24 (2001),Rizzoli & Isles (2010),Switched at Birth (2011),and Extant (2014).