Leonard Hofstadter

Leonard is the most sociable of the group . He's the first who talks with Penny and he is instantly captivated by Penny, and from the beginning sets out to date her.
Although Leonard feels at home with his geek colleagues, he wants to be more social. Among the main characters, he generally has the least amount of difficulty interacting with "non-geek" individuals. While certainly a geek by most definitions, he is less socially inept than Sheldon (who is unable to grasp social norms and is often even dismissive of them), Raj (who is unable to talk to women unless he is under the influence of alcohol or anti-anxiety prescription drugs), and Howard (who is often seen as "creepy" when flirting with women, including Penny).
Leonard Hofstadter is portrayed by Johnny Galecki.
In 2011, Galecki was nominated for a Primetime Emmy Award for Outstanding Lead Actor in a Comedy Series and a Golden Globe Award for Best Actor – Television Series Musical or Comedy.