I Know This Much is True (HBO) - Cast

Mark Ruffalo

as Dominick Birdsey / Thomas Birdsey



Rosie O'Donnell

as Lisa Sheffer


Archie Panjabi

as Dr. Patel


Imogen Poots

as Joy Hanks


Juliette Lewis

as Nedra Frank


Kathryn Hahn

as Dessa Constantine


John Procaccino

as Ray Birdsey


Rob Huebel

as Leo


Michael Greyeyes

as Ralph Drinkwater


Aisling Franciosi

as Young Dessa


Philip Ettinger

as Young Dominick / Young Thomas


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