I Know This Much Is True

Rob Huebel

Leo

John Procaccino

Ray Birdsey

Mark Ruffalo

Thomas Birdsey

Gabe Fazio

Thomas Birsdey Acting Double

Laura Esterman

Ruth Rood

Aisling Franciosi

Young Dessa

Michael Greyeyes

Ralph Drinkwater

Rocco Masihi

8-Year-Old Thomas Birdsey

Philip Ettinger

Young Adult Thomas Birdsey

Donnie Masihi

8-Year-Old Dominick Birdsey

Laura Esterman

Mrs. Rood

Philip Ettinger

17-19-Year-Old Dominick Birdsey

Melissa Leo

Ma

Imogen Poots

Joy Hanks

Juliette Lewis

Nedra Frank

Rosie O'Donnell

Lisa Sheffer

Gabe Fazio

Dominick Birdsey

Kathryn Hahn

Dessa Constantine

Bruce Greenwood

Dr. Hume

Archie Panjabi

Dr. Patel

Gabe Fazio

Shawn Tudesco

Marcello Fonte

Domenico Tempesta

Mark Ruffalo

Dominick Birdsey