Michael Stuhlbarg

Larry Gopnik

Richard Kind

Uncle Arthur

Fred Melamed

Sy Ableman

Sari Lennick

Judith Gopnik

Aaron Wolff

Danny Gopnik

Jessica McManus

Sarah Gopnik

Peter Breitmayer

Mr. Brandt

Brent Braunschweig

Mitch Brandt

David Kang

Clive Park

Benjamin Portnoe

Danny's Reefer Buddy

Jack Swiler

Boy on Bus

Andrew S. Lentz

Cursing Boy on Bus

Jon Kaminski Jr.

Mike Fagle

Ari Hoptman

Arlen Finkle

Alan Mandell

Rabbi Marshak

Amy Landecker

Mrs. Samsky

George Wyner

Rabbi Nachtner

Michael Tezla

Dr. Sussman

Katherine Borowitz

Friend at the Picnic

Steve Park

Clive's Father

Allen Lewis Rickman

Shtetl Husband

Yelena Shmulenson

Shtetl Wife

Fyvush Finkel

Dybbuk?

Ronald Schultz

Hebrew School Teacher

Raye Birk

Dr. Shapiro

Jane Hammill

Larry's Secretary

Claudia Wilkens

Marshak's Secretary

Simon Helberg

Rabbi Scott

Adam Arkin

Divorce Lawyer

James Cada

Cop #1

Michael Lerner

Solomon Schlutz

Charles Brin

Hebrew School Principal

Michael Engel

Torah Blesser

Tyson Bidner

Magbiah

Phyllis Harris

Hebrew School Tea Lady

Piper Sigel-Bruse

D'vorah

Hannah Nemer

Sarah's Friend

Rita Vassallo

Law Firm Secretary

Warren Keith

Dick Dutton (voice)

Neil Newman

Cantor

Tim Russell

Detective #1

Jim Lichtscheidl

Detective #2

Wayne A. Evenson

Russell Krauss

Scott Thompson Baker

Sci-Fi Movie Hero

Landyn Banx

Physics Student (uncredited)

Punnavith Koy

Physics Nerd (uncredited)

Joel Thingvall

Bar Mitzvah Guest (uncredited)

Amanda Day

Physics Student (uncredited)