Howard Wolowitz

Howard is a Jewish Aerospace Engineer at Caltech's Department of Applied Physics who often hangs out at Leonard Hofstadter and Sheldon Cooper's apartment. He is best friends with Rajesh Koothrappali. Howard fancies himself a "ladies' man" and he provides outrageous pick-up lines whenever there is a female present, resulting in humiliating turn-downs. Howard describes himself as a romantic, although he usually comes across as overtly sexual and, in the words of Penny, disgusting. However, Penny's animosity toward Howard has mellowed somewhat since Howard began dating Penny's work colleague Bernadette, to whom he is now engaged.

Howard, much like Penny, dislikes many of Sheldon's antics, but he has grown accustomed to them. One time, Penny asked how Sheldon had gotten friends and Howard simply replied "We liked Leonard".

Howard is allergic to peanuts, and they pose a life-threatening risk to him. He also mentioned having transient idiopathic arrhythmia. Howard is proud of the fact that he has only 3% body fat, which Raj notes makes him look like a human chicken wing.

Howard Wolowitz is portrayed by Simon Helberg.