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David Krumholtz (born May 15, 1978) is an American actor. Krumholtz is best known for portraying Bernard in The Santa Clause franchise (1994–present), Michael Eckman in 10 Things I Hate About You (1999), Goldstein in the Harold & Kumar film trilogy (2004–2011), Charlie Eppes in the CBS drama series Numb3rs (2005–2010), and Isidor Isaac Rabi in Oppenheimer (2023). Krumholtz has also had other supporting roles in notable films such as Addams Family Values (1993), The Ice Storm (1997), Slums of Beverly Hills (1998), Ray (2004), Serenity (2005), Superbad (2007), Hail, Caesar! (2016), Sausage Party (2016), Wonder Wheel (2017), and The Ballad of Buster Scruggs (2018). He also portrayed Harvey Wasserman in the HBO drama series The Deuce (2017–2019) and Monty Levin in the HBO miniseries The Plot Against America (2020). Krumholtz made his Broadway debut in the 1992 play Conversations with My Father. He returned to Broadway playing Hermann Merz in Tom Stoppard's semi-biographical Holocaust play Leopoldstadt (2022), for which he received a Drama League Award nomination. Description above from the Wikipedia article David Krumholtz, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Mr. Irrelevant: The John Tuggle Story
as Whitey Horai

Supergirl
as Zor-El

Influenced
as Gary

Kill Me
as Lou

Forelock
as Randy

Springsteen: Deliver Me from Nowhere
as Al Teller

An Intimate Evening with Adam Pally

Long Story Short
as (voice)

Paradise Records
as Wise Guy #2

The Studio
as Mitch Weitz

Scattered

Batman: Caped Crusader
as Fletcher Demming (voice)

Sausage Party: Foodtopia
as Lavash (voice)

If That Mockingbird Don’t Sing
as Alfonso

Not Fade Away: A Celebration of the Grateful Dead Legacy
as Self

Lousy Carter
as Lousy Carter

Kidnapping Oscar Isaac
as Self

Oppenheimer
as Isidor Rabi

White House Plumbers
as William Bittman

Poker Face
as JB Turner

The Santa Clauses
as Bernard

Angelyne
as Max Allen's Lawyer

Super Pumped: The Battle for Uber
as Sergey Brin

Down with the King
as Paul

Class
as Adam
Entree Des Artists
as David "The Producer"

Asking for It
as The Cop

Awkwafina Is Nora from Queens
as Jerry Harrison

Crown Vic
as Stroke Adams

The Twilight Zone

Frances Ferguson
as Group Therapy Leader

The Ballad of Buster Scruggs
as Frenchman (segment "The Ballad of Buster Scruggs")

The Rookie
as Ezra Kane

Living Biblically
as Rabbi Gil

A Futile and Stupid Gesture
as Time-Life Publisher

Wonder Wheel
as Jake

The Deuce
as Harvey Wasserman

All Hail King Julien: Exiled
as Timo / Mom-Bot (voice)

Ghost Team
as Stan

Sausage Party
as Kareem Abdul Lavash (voice)

The Interestings
as Ethan Figman

Casual Encounters
as Sammy Deetz

Hail, Caesar!
as Communist Writer

I Saw the Light
as James Dolan

Billions
as Frotty Anisman

Master of None
as Nathan

Difficult People
as Ray

Fresh Beat Band of Spies
as Santa Claus (voice)

Star vs. the Forces of Evil
as Cobalt Ferrero (voice)

All Hail King Julien
as Timo (voice)

The Judge
as Mike Kattan

The Big Ask
as Andrew

HitRECord on TV with Joseph Gordon-Levitt

Mom
as Gregory

This Is the End
as David Krumholtz

Seth Rogen Is the Worst Person in the World
as David Krumholtz

Tuna
as Getty

Partners
as Joe Goodman

The Newsroom
as Dr. Jack Habib

Comedy Bang! Bang!
as Self