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I Know This Much Is True

6-Episode Limited Series | TV-MA

Based on the bestselling novel by Wally Lamb, written and directed by Derek Cianfrance, and starring Mark Ruffalo, this limited series follows Dominick Birdsey as he struggles to care for his twin brother, Thomas, while discovering the truth about his own family history.

I Know This Much is True Season 1 Episode 4
Catch Up on This Season

Watch the latest epsiode of I Know This Much is True, now available to stream.

I Know This Much is True Season 1 Episode 5
Preview the Next Episode

Get a peek at what’s coming up this season.

i know this much is true
Imogen Poots in Character: Joy

“She’s quite a tragic figure.” Poots offers her perspective on capturing both the sadness and hope of Dom's girlfriend.

Listen on Spotify

Follow the official I Know This Much Is True playlist to stream all the songs featured in the series.

I Know this Much is True
The Heart of the Story

Mark Ruffalo and Derek Cianfrance share what the series is about at its core.

A Director's Approach With Derek Cianfrance

“It's all high drama in small, ordinary events.” The director, writer and executive producer shares his mission for the series.

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