I Know This Much Is True: Miniseries - Rotten Tomatoes

I Know This Much Is True: Miniseries (2020)



Critic Consensus: I Know This Much is True's relentlessly grim plotting makes it a difficult watch, but the strength of Mark Ruffalo's dual performances is enough to make it a dark tale worth tuning into.


I Know This Much Is True: Miniseries Videos

Tv Season Info

Adaptation of Wally Lamb's novel about identical twin brothers Dominick and Thomas Birdsey in a family saga that follows their parallel lives in a story of betrayal, sacrifice and forgiveness.


Mark Ruffalo
as Dominick Birdsey/Thomas Birdsey
Rosie O'Donnell
as Lisa Sheffer
Archie Panjabi
as Dr. Patel
Imogen Poots
as Joy Hanks
John Proccacino
as Ray Birdsey
Philip Ettinger
as Dominick Birdsey/Thomas Birdsey (young adult)
Aisling Franciosi
as Dessa Constantine (young)
Michael Greyeyes
as Ralph Drinkwater
Guillermo Díaz
as Sergeant Mercado
Marcello Fonte
as Domenico Onofrio Tempesta
Juliette Lewis
as Nedra Frank
Kathryn Hahn
as Dessa Constantine
View All

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Critic Reviews for I Know This Much Is True: Miniseries

All Critics (52) | Top Critics (20)

It's not Ruffalo's fault - he's great here - but the material is spread too thin over too much canvas, then culminates in too banal a "truth." In a word, it's as dull as it is grim.

May 7, 2020 | Rating: 2/4 | Full Review…
Top Critic

Each brother could become a showy caricature of their written selves, and yet [Ruffalo] lives in the small, quiet moments as well as big, explosive outbursts.

May 7, 2020 | Rating: B | Full Review…

"I Know This Much Is True" misses the mark in terms of storytelling. It just sits there, a roiling mass of misery that fails to provide you with a compelling reason to keep watching.

May 7, 2020 | Full Review…

Seeing actors do what they do best, with Cianfrance giving them the space to do it, makes I Know This Much is True a real feast.

May 8, 2020 | Rating: 3.5/4 | Full Review…

I Know This Much is True does not manage to fully captivate its audience due to its very lose adaptation of the source material. [Full Review in Spanish]

June 10, 2020 | Rating: 2.5/5 | Full Review…

Ruffalo is convincingly grim in both roles, but this kind of dark drama that tries to find poetry in misery won't be what most people need right now.

May 22, 2020 | Full Review…

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