Alexander Koch
Born (1988-02-24) February 24, 1988 (age 33)
EducationDePaul University (BFA)
Years active2011–present

Alexander Koch (born February 24, 1988)[1] is an American actor. He played the series regular role of Junior Rennie on the CBS drama series Under the Dome, based on the novel by Stephen King.[2][3][4][5][6][7][8] He currently resides in Los Angeles.[1] Alex Koch appears in the fifth season of Lucifer as Ella Lopez's new love interest, Pete Daily.[9] He co-starred in the 2020 meta-thriller Black Bear.

Life and career

Koch was born in Grosse Pointe Park, Michigan, to Joseph and Joya Koch. Koch has two older sisters, Ashleigh and Michelle.[6] His father is late Wayne County assistant prosecutor Joseph Koch. "It was kind of my first introduction into acting, because I would go to the courtroom with him and watch him work," recalls Koch of his dad, who died in 2001. "When he was presenting cases and what-not, it was almost as if he was doing monologues".[10]

Koch graduated from Grosse Pointe South High School in 2006.[11] Koch was heavily involved in both local community and high school theater productions.[1]

He attended The Theatre School at DePaul University and immersed himself in productions such as "A Lie of the Mind," "Hair," "Intimate Apparel," "Normal," "Assassins" and "Reefer Madness: The Musical". In 2012 he received his BFA in acting.[1] Koch made his film debut as "Frank" in Eddie O'Keefe's independent short film "The Ghosts". Koch works with music and images when acting. "When I'm working, I like to work with a lot of music. The more I can think of what a character would listen to, the more I feel like I have a place to create from". [Alexander agrees that he's using songs to give him insights into his character and not just to get him into an emotional space]. "I have a record player at home that I usually listen to, but since I've been in Wilmington [North Carolina, where the series is filming], I couldn't bring it with me. When I'm on set, I'm listening through headphones on my computer, just trying to zone in and focus. Britt [Robertson] always makes fun of me about how I'm always in my chair listening to music". He also works with images. "When I'm working, I find images and kind of attach to them. It just makes the dialogue so much stronger if you have a distinct image in your mind".[4]

In his off time, Koch enjoys writing, music, playing the guitar and collecting vinyl records.[1]



Year Title Role Notes
2008 Brüder im Herrn Mark Short film
2011 The Ghosts Frank Short film
2011 Winter Charlie Short film
2016 Always Shine Matt
2017 Maya Dardel Paul
2018 Big Fork Kipton
2020 Black Bear Mike
Sightless Clayton


Year Title Role Notes
2012 Underemployed N/A Episode: "The Trivial Pursuit"
2013–2015 Under the Dome James "Junior" Rennie Main role (39 episodes)
2017 Parked Mark Television film
2018 Sorry for Your Loss Nicholas Schwaback Episode: "I Want a Party"
2019 The Code Bard 3 episodes
2020 Lucifer Pete Daily 3 Episodes

Music videos

Year Song Artist(s) Director(s) Role
2017 "Issues" Julia Michaels Tabitha Denholm Male Lead
2019 "Something to Do" Vivian Girls Jason Lester Cassie's Boyfriend


  1. ^ a b c d e Under The Dome Cast: Alexander Koch
  2. ^ Lauren Yapalater. "The Moment Has Come To Be Obsessed With Alexander Koch". Retrieved 2013-07-16.
  3. ^ "5 Questions with 'Under The Dome's' Alexander Koch". 2013-04-29. Archived from the original on 2013-07-05. Retrieved 2013-07-16.
  4. ^ a b Mark Blankenship (2013-07-05). "Screen Habits: 'Under the Dome' Actor Alexander Koch | Tribeca". Archived from the original on 2013-07-19. Retrieved 2013-07-16.
  5. ^ "Alexander Koch Talks UNDER THE DOME, Being a Stephen King Fan, and More". Collider. July 2013. Retrieved 2013-07-16.
  6. ^ a b "Grosse Pointe Park native Alexander Koch adds tense menace to 'Under the Dome' | Detroit Free Press". Retrieved 2013-07-16.
  7. ^ Andreeva, Nellie (2013-01-23). "Natalie Martinez & Alex Koch Cast In CBS' 'Under The Dome' Series". Retrieved 2013-07-16.
  8. ^ "DePaul grad goes to 'Dome' - Chicago Sun-Times". Retrieved 2013-07-16.
  9. ^ Entertainment Weekly
  10. ^ Meet metro Detroit native who plays scary Junior on 'Under the Dome' | Detroit Free Press |
  11. ^ "South graduate to make debut on silver screen". Archived from the original on 2013-11-09. Retrieved 2013-08-08.