[3] Matt Shakman also played a role in the foundation of Firefly, which operated as a theatre collective staging experimental projects in its early days.
[2] Klein's first major Los Angeles stage appearance[6] came in a March 2000 production of Mark Ravenhill's Shopping and Fucking at the Celebration Theatre.
In 2003, Klein was a producer on Geraldine Hughes' one-woman show, Belfast Blues, which premiered at the Black Dahlia Theatre[1] in February of that year.
[13] In September 2004, Klein produced and starred in David Schulner's An Infinite Ache alongside Suzy Nakamura at the Black Dahlia Theatre.
[6] In 2011, Klein co-created (with Jordana Malick) the annual Unscreened event in which screenwriters, directors, and actors would stage a series of short plays using scripts that were often initially intended for film or television.
[21] The series ran until 2015 and featured actors like Lindsey Kraft, Jerrika Hinton, Tig Notaro, Nate Corddry, Maria Thayer, and Klein himself in plays penned by writers like James Ponsoldt, Aisha Muharrar, and Dahvi Waller.
[24] Through Firefly, he has also produced several other films, including Kensho at the Bedfellow[25] (2017),[26] Out of Omaha (2018),[27] and Wrestle (which was distributed by Oscilloscope[28] and premiered on PBS' Independent Lens in 2019).