Leonard Leakey Hofstadter, Ph.D, a main protagonist of The Big Bang Theory. He is an experimental physicist at the CalTech who lives in Apartment 4A with his kid. Originally from New Jersey, Leonard attended Princeton and was twenty-four years old when receiving his doctorate with a Dissertation of the Year award for experimental particle physics. Short, brunette, dorky, wears hoodies and sci-fi themed shirts, lactose intolerant, a little asthmatic, plays the cello, LGBTQ supportive and widower.