Joaquin Phoenix Beau Wassermann Patti LuPone Mona Wassermann Amy Ryan Grace Nathan Lane Roger Kylie Rogers Toni Denis Ménochet Jeeves Parker Posey Elaine Bray Zoe Lister-Jones Young Mona Armen Nahapetian Teen Beau Julia Antonelli Teen Elaine Stephen McKinley Henderson Therapist Richard Kind Dr. Cohen Hayley Squires Penelope Julian Richings Strange Man Bill Hader UPS Guy Alicia Rosario Liz Catherine Bérubé Hero Beau's Wife Stephanie Herrera Martha Bradley Fisher Birthday Boy Stab Man Michael Esper Officer Johnson Manuel Tadros Cheapo Depot Cashier Karl Roy Man with Face Tattoos Tyrone Benskin Rattled Businessman Archie Madekwe Laughing Man Luis Oliva Crust Punk (Eyes Gouged) Marie-Michelle Garon Fraught Mother Looking for Boat Boy Maev Beaty Angel / Play Narrator Patrick Kwok-Choon Orphan Hero Michael Gandolfini Beau’s Son Théodore Pellerin Beau’s Son Mike Taylor Beau’s Son Ryan S. Hill Hero Beau's Young Son Bentley Hughes Hero Beau's Young Son Kwasi Songui Orphan Ladybug Man Tristan D. Lalla Costume Designer Orphan Emmanuel Schwartz Orphan Chorus Member Cat Lemieux Orphan Chorus Member Lily Bird Samanda Arthur Holden Duncan / God on Cloud / Hero Beau’s Wife Alex Bisping Orphan Production Designer Joe Cobden News Correspondent (Brian Galloway) Joaquin Phoenix Beau Wassermann Patti LuPone Mona Wassermann Amy Ryan Grace Nathan Lane Roger Kylie Rogers Toni Denis Ménochet Jeeves Parker Posey Elaine Bray Zoe Lister-Jones Young Mona Armen Nahapetian Teen Beau Julia Antonelli Teen Elaine Stephen McKinley Henderson Therapist Richard Kind Dr. Cohen Hayley Squires Penelope Julian Richings Strange Man Bill Hader UPS Guy Alicia Rosario Liz Catherine Bérubé Hero Beau's Wife Stephanie Herrera Martha Bradley Fisher Birthday Boy Stab Man Michael Esper Officer Johnson Manuel Tadros Cheapo Depot Cashier Karl Roy Man with Face Tattoos Tyrone Benskin Rattled Businessman Archie Madekwe Laughing Man Luis Oliva Crust Punk (Eyes Gouged) Marie-Michelle Garon Fraught Mother Looking for Boat Boy Maev Beaty Angel / Play Narrator Patrick Kwok-Choon Orphan Hero Michael Gandolfini Beau’s Son Théodore Pellerin Beau’s Son Mike Taylor Beau’s Son Ryan S. Hill Hero Beau's Young Son Bentley Hughes Hero Beau's Young Son Kwasi Songui Orphan Ladybug Man Tristan D. Lalla Costume Designer Orphan Emmanuel Schwartz Orphan Chorus Member Cat Lemieux Orphan Chorus Member Lily Bird Samanda Arthur Holden Duncan / God on Cloud / Hero Beau’s Wife Alex Bisping Orphan Production Designer Joe Cobden News Correspondent (Brian Galloway) Harry Strandjofski Superintendent / Catering Manager Anana Rydvald Teen Elaine's Mother Isabelle Brabant Nurse David Mamet Rabbi Karim Babin Caterer Lee Villeneuve Mona Henchman Who Throws Lawyer Gord Robertson Monster Puppeteer Marc-André Casavant Dancer (uncredited) Ari Aster A Neighbor of Beau's (uncredited)