Simon Maxwell Helberg is an American actor and comedian. 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.

Howard Joel Wolowitz is a fictional character on the CBS television series The Big Bang Theory, portrayed by actor Simon Helberg. Among the four main male characters in the show, Howard is distinctive for being an engineer—rather than a physicist—and lacking a PhD. He is named after and based on a computer programmer known by the show's co-creator; Bill Prady. Howard is the only starring character who has been to the International Space Station. Along with Sheldon Cooper, Leonard Hofstadter, and Raj Koothrappali, Howard is part of the central cast of the show.