I Know This Much Is True
As of April 28, 2026, I Know This Much Is True is a series that has completed production. The production companies attached are Production Office and FilmNation Entertainment (NY). Attached are director Derek Cianfrance; and producers Judith Regan and Jeff Bernstein. Cast includes Mark Ruffalo. It was scheduled to start shooting in Poughkeepsie, NY in March 2019. Production List last updated this listing on April 28, 2026.
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Project Summary
Middle-aged Dominick Birdsey recounts his troubled relationship with Thomas, his paranoid schizophrenic twin brother, and his efforts to get him released from an asylum.
Production Contacts— Members Only
The production office contacts for I Know This Much Is True are on file at Production List, last updated April 28, 2026, and are available to members. Membership is $29.95 for the first month.
Cast & Crew
Directing
| Director | Derek Cianfrance |
Production
| Producer | Judith Regan |
| Producer | Jeff Bernstein |
Writing
| Writer | Derek Cianfrance |
Cast
| Cast | Mark Ruffalo |
Contact details for each person listed are on file and available to members.
Member Discussion
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Working on I Know This Much Is True
I Know This Much Is True has finished principal photography. How productions hire crew · Working as an extra · Reaching the production office
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Source: Production List, published by the Film & Television Industry Alliance. Cite this page as https://www.productionlist.com/production/i-know-this-much-is-true (last updated Apr 28, 2026).