Diego Klattenhoff

Diego Klattenhoff (born November 30, 1979) is a Canadian actor known for his portrayals of Mike Faber in the Showtime series Homeland and as FBI Special Agent Donald Ressler in The Blacklist. He has also appeared as Derek in Whistler, Ivan in Men in Trees as well as having a minor role in Mean Girls as Shane Oman.

Early life Klattenhoff was born in French River, Pictou County, Nova Scotia. He moved to Toronto at the age of 19 to pursue an acting career. For a number of years, he worked as a bartender while studying in theater workshops. His father was originally from Germany and settled in Canada before Klattenhoff was born.

Career Klattenhoff studied with some of Canada's most respected acting coaches, including David Rotenberg, Bruce Clayton and Rae Ellen Bodie. His first notable acting role was in Mean Girls (2004). He followed that with a string of appearances in notable TV shows like Smallville and Stargate SG-1, and films like Lucky Number Slevin (2006). Since 2006, he has been in recurring roles like Young Jacob in CBC Television's At the Hotel, Derek in CTV's Whistler, Ivan Palacinke in ABC's Men in Trees and Mike Callahan in NBC's Mercy.

Klattenhoff appeared in Homeland as Mike Faber, a Marine Captain whose best friend returns to the U.S. after disappearing in Iraq eight years earlier. He and the cast were nominated once for a Screen Actors Guild Award for Best Cast, and twice for a PAAFTJ Television Awards for Best Cast in a Drama Series. He has also guest starred on television series such as Psych, Supernatural, 24, and Falling Skies.

Klattenhoff starred in J. J. Abrams's television film Anatomy of Hope and appeared in the Guillermo del Toro film Pacific Rim (2013) and the sci-fi thriller After Earth (2013). In March 2013, Klattenhoff joined the cast of the NBC thriller The Blacklist, as FBI Special Agent Donald Ressler. The show premiered on September 23, 2013, to 12.6 million viewers. Klattenhoff starred in the Canadian science fiction film Radius (2017).

Filmography

Film Year Title Role Notes 2002 Straight in the Face Daniel Short film 2003 Autobiography of an Insect Cameron Short film 2003 Blessings Benny Television movie 2003 Family Curse Television movie 2004 Mean Girls Shane Oman 2004 Cube Zero Quigley 2005 Ice Princess Kyle Dayton 2005 Murder in the Hamptons Traffic Cop Television movie 2005 The Last Hit Sasha 2005 Dry Whiskey Terry Short film 2005 Shania: A Life in Eight Albums Paul Television movie 2005 Recipe for a Perfect Christmas Zach Television movie 2005 Yesteryears Television movie 2006 Lucky Number Slevin Ginger 2006 Fallen Nathaniel Uncredited 2006 Firestorm: Last Stand at Yellowstone Willis Lee Television movie 2007 Fire Serpent Young Dutch Television movie 2008 Lost Behind Bars Charlie Quinn Television movie 2008 The Informers Dirk 2009 Anatomy of Hope Brendan Casey Television movie 2010 The Dry Land Henry 2012 Unconditional Billy 2013 Kilimanjaro Troy 2013 After Earth Veteran Ranger 2013 Pacific Rim Yancy Becket 2016 Lavender Alan 2017RadiusLiam

Television Year Title Role Notes 2001–2002 Doc Jason 2 episodes 2002 Witchblade Uncredited Episode: "Destiny" 2003 Wild Card Episode: "Pilot" 2003 Mutant X Janitor #1/Johnny Cummings Episode: "Shadows of Darkness" 2003 Veritas: The Quest Tymus Episode: "Avalon" 2004 1-800-Missing Brad Whitman Episode: "One Night Stand" 2004 Sue Thomas: F.B.Eye Jason Albright Episode: "The Bounty Hunter" 2005 Smallville Josh Greenfield Episode: "Krypto" 2005 Stargate SG-1 Team Leader Episode: "Ex Deus Machina" 2006 At the Hotel Young Jacob 6 episodes Recurring role (Season 1) 2006 Psych Dylan Maxwell Episode: "Speak Now or Forever Hold Your Piece" 2006 Supernatural Duane Tanner Episode: "Croatoan" 2007 Whistler Derek 12 episodes Recurring role (Season 2) 2008 Men in Trees Ivan Palacinke 6 episodes Recurring role (Season 2) 2009 The Listener Tom Crawford Episode: "Emotional Rescue" 2009 ER Jay Episode: "Shifting Equilibrium" 2009 24 Sergeant Cadden 2 episodes 2009–2010 Mercy Mike Callahan 22 episodes Main role (Season 1) 2011 Falling Skies Lieutenant Danner Episode: "Mutiny" 2012 Longmire Eli Episode: "The Cancer" 2011–2013 Homeland Mike Faber 25 episodes Main role (Seasons 1–2) Guest role (Season 3) Nominated—Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series 2013–2023 The Blacklist Donald Ressler 218 episodes Main role (Seasons 1–10) 2024 Blue Bloods Officer Michael Tate Episode: "Without Fear or Favor" 2025 Tracker Roger McLaren Episode: "The Mercy Seat" 2026 The Borderline