
Simon Maxwell Helberg (born December 9, 1980) is an American actor, comedian, and musician. He is known for playing Howard Wolowitz in the CBS sitcom The Big Bang Theory (2007–2019), for which he won the Critics' Choice Television Award for Best Supporting Actor in a Comedy Series, and as Cosmé McMoon in the film Florence Foster Jenkins (2016), for which he was nominated for the Golden Globe Award for Best Supporting Actor – Motion Picture.
He has appeared on the sketch comedy series MADtv, and has appeared in films such as Old School (2003), Good Night, and Good Luck (2005), Walk Hard: The Dewey Cox Story (2007), A Serious Man (2009), and Annette (2021).
He wrote, directed (along with his wife Jocelyn Towne), and starred in the film We'll Never Have Paris (2014), which is based on he and his wife's relationship.

Old School
2003 · as Jerry

A Cinderella Story
2004 · as Terry

A Serious Man
2009 · as Rabbi Scott

Evan Almighty
2007 · as Staffer

National Lampoon's Van Wilder
2002 · as Vernon

Good Night, and Good Luck.
2005 · as CBS Page

Walk Hard: The Dewey Cox Story
2007 · as Dreidel L'Chaim

Space Oddity
2023 · as Dimitry

Mama's Boy
2007 · as Rathkon

Annette
2021 · as The Accompanist

For Your Consideration
2006 · as Junior Agent

For Worse
2026 · as Mediator

Florence Foster Jenkins
2016 · as Cosmé McMoon

Careless
2007 · as Stewart

As They Made Us
2022 · as Nathan

Paint It Black
2016 · as Jeremy

Hollywood Adventures
2015 · as Translator

We'll Never Have Paris
2014 · as Quinn