
Best known for his roles in such films as Lucky, Coherence, Roman J. Israel, Esq., and Daniel Martinico’s OK, Good and Excursions, Armstrong's television work includes recurring roles on True Lies, Bosch: Legacy and NCIS as well as The Blacklist, Room 104, and Fear the Walking Dead. In theater, he recently appeared in Evanston Salt Costs Climbing at Rogue Machine Theatre. He is also known for his onstage roles in The Ants at the Geffen Playhouse, Twilight: Los Angeles, 1992 at the Mark Taper Forum, Uncle Vanya at Pasadena Playhouse, and Power of Sail also at the Geffen Playhouse. Recent VO includes podcast series DUST, Agent Stoker, and Blood Weed on Audible Originals, as well as voices for Cinema Toast.
Cursed in Baja
2024
Shatter Belt
2023
Rachel Hendrix
2023
True Lies
2023
Dark Cloud
2022
Bosch: Legacy
2022
The Only One
2021
No Man of God
2021
Mister Limbo
2021
Burning Dog
2020
Messiah
2020
Cuck
2019
School Spirit
2019
Grace
2018
For the People
2018
Nostalgia
2018
Lucky
2017
Room 104
2017
DRIB
2017
Stitchers
2015
Coherence
2014
The Crazy Ones
2013
The Blacklist
2013
Lay the Favorite
2012
OK, Good
2012
Weak Species
2009
Nanking
2007
NCIS
2003
Monk
2002
Char·ac·ter
2012
OK, Good
2012








































