
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.
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Supergirl
2026 · as Zor-El

Oppenheimer
2023 · as Isidor Rabi

10 Things I Hate About You
1999 · as Michael Eckman

Superbad
2007 · as Benji Austin

Sausage Party
2016 · as Kareem Abdul Lavash (voice)

Serenity
2005 · as Mr. Universe

The Judge
2014 · as Mike Kattan

Addams Family Values
1993 · as Joel Glicker

This Is the End
2013 · as David Krumholtz

Guess Who
2005 · as Jerry MacNamara

The Ballad of Buster Scruggs
2018 · as Frenchman (segment "The Ballad of Buster Scruggs")

The Ice Storm
1997 · as Francis Davenport

Harold & Kumar Go to White Castle
2004 · as Seth Goldstein

Crown Vic
2019 · as Stroke Adams

The Santa Clause
1994 · as Bernard

Hail, Caesar!
2016 · as Communist Writer

Ray
2004 · as Milt Shaw

The Santa Clause 2
2002 · as Bernard