Which actor plays Howard Wolowitz in The Big Bang Theory?

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Which actor plays Howard Wolowitz in The Big Bang Theory? Simon Helberg plays Howard Wolowitz.

Helberg joined the CBS sitcom when it premiered in 2007 and remained part of the main cast throughout all 12 seasons. Howard is an aerospace engineer who works at Caltech, making him distinct from the show's physicists, Leonard, Sheldon, and Raj. Unlike most of his friends, Howard does not hold a doctorate; he has a master's degree in engineering from MIT.

Howard begins the series as an overconfident flirt who lives with his unseen, frequently shouting mother. His character develops considerably after he starts dating Bernadette Rostenkowski, eventually marrying her and becoming a father. He also becomes an astronaut and travels to the International Space Station during the fifth-season finale.

A common mix-up is confusing the actor with Howard's friends: Jim Parsons plays Sheldon, Johnny Galecki plays Leonard, and Kunal Nayyar plays Raj. Simon Helberg also reprised Howard in a voice role connected with Young Sheldon.

Source: Wikipedia · fact-checked Aug. 2026

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