Sheldon Cooper

Sheldon Lee Cooper, Ph.D., Sc.D., is a fictional character in the CBS television series The Big Bang Theory and its spinoff series Young Sheldon, portrayed by actors Jim Parsons and Iain Armitage respectively (with Parsons as the latter series' narrator).

For his portrayal, Parsons won four Primetime Emmy Awards, a Golden Globe Award, a TCA Award, and two Critics' Choice Television Awards.

The character's childhood is the focus of Young Sheldon, in which he grows up in East Texas with his family as a child prodigy.

The adult Sheldon is a senior theoretical physicist at the California Institute of Technology (Caltech), and for the first ten seasons of The Big Bang Theory shares an apartment with his colleague and best friend, Leonard Hofstadter (Johnny Galecki); they are also friends and coworkers with Howard Wolowitz (Simon Helberg) and Rajesh Koothrappali (Kunal Nayyar).

In season 10, Sheldon moves across the hall with his girlfriend Amy Farrah Fowler (Mayim Bialik), in the former apartment of Leonard's wife Penny (Kaley Cuoco).

He has a genius-level IQ of 187.

In The Big Bang Theory, it is said that his and Leonard's IQs add up to 360, meaning Leonard has an IQ of 173.

In Young Sheldon, his mother says that he has the same IQ as Albert Einstein and Stephen Hawking, though neither is known to have taken an IQ test.

However, he displays a fundamental lack of social skills, a tenuous understanding of humor, and difficulty recognizing irony and sarcasm in other people, although he himself often employs them.

He exhibits highly idiosyncratic behavior and a general lack of humility, empathy, and toleration.

These characteristics provide the majority of the humor involving him, which are credited with making him the show's breakout character.

Some viewers have asserted that Sheldon's personality is consistent with autism spectrum disorder (or what used to be classified as Asperger's Syndrome).

Co-creator Bill Prady has stated that Sheldon's character was neither conceived nor developed with regard to Asperger's, although Parsons has said that in his opinion, Sheldon "couldn't display more facets" of Asperger's syndrome.

The character of Sheldon Cooper was inspired by a computer programmer personally known to series co-creator Bill Prady.

He and his friend Leonard Hofstadter are named in honor of actor/producer Sheldon Leonard and Nobel Prize Laureate Leon Cooper.

Chuck Lorre originally intended Johnny Galecki to play the role, but Galecki thought he would be "better suited" for the character of Leonard.

Lorre said that when Jim Parsons auditioned for the role, he was "so startlingly good" that he was asked to reaudition "to make sure he hadn't gotten lucky".

Sheldon and his fraternal twin sister, Missy, were born on February 26, 1980, at Lawrence Memorial Hospital in Galveston, Texas, and raised in Medford, a fictional small town in East Texas that is a three-hour drive from Dallas, along with their older brother, George Jr., by their mother, Mary Cooper, an overtly devout Baptist, and their father, George Cooper Sr., a football coach.

Sheldon once got his father fired when he told Mr. Hinckley, a store owner, that George was stealing from the cash register.

In Young Sheldon, this is retconned: his father is a football coach who was fired from his coaching position in Galveston because he disclosed that other coaches were illegally recruiting players to their school, forcing the family to return to Medford.

He does drink, mostly beer, and is a loving father who is trying to understand his intellectually gifted son.

The only member of his family to have actively encouraged his work in science was his maternal grandfather, whom he cherished and affectionately called "Pop-Pop", and who died when Sheldon was five years old.

Pop-Pop's loss is what caused Sheldon to not like Christmas very much when his Christmas wish to bring Pop-Pop back did not come true.

Sheldon's closest relative is his maternal grandmother whom he affectionately calls "Meemaw", and who in turn calls him "Moon Pie".

His aunt was also said to have encouraged his work in science by giving him medical equipment, "in case his work in physics failed, he'd have a 'trade' to fall back on".

In Young Sheldon, it is shown that his childhood friend Tam was the one who introduced him to non-scientific interests such as comic books and Dungeons & Dragons.

Sheldon was interested in science from an early age, and was a child prodigy, although due to his behavioral quirks and his lack of humility about his superior intellect, he was bullied by classmates and neighbors.

Sheldon entered college at the age of eleven, and at age fourteen he graduated from college summa cum laude.

Throughout the entire run of The Big Bang Theory, the college he went to for undergraduate studies had not been revealed, but he always felt it was superior to his fellow Big Bang Theory colleagues' alma maters of Princeton (Leonard), Cambridge (Raj), and MIT (Howard); however, it is implied in "The Tam Turbulence" (Season 12, Episode 4) that Sheldon is in fact a Caltech alumnus, and in Young Sheldon he is said to enroll at the fictional East Texas Tech.

From then, he worked on his doctorate, was a visiting professor at the University of Heidelberg in Germany, was the youngest person at the time to receive the Stevenson Award, and has appeared on the cover of Journal of Physical Chemistry A.

Sheldon is now a theoretical physicist doing research at Caltech, although he stated in Young Sheldon that he could not see himself living in California due to their carefree lifestyles.

Like Leonard, Raj, and Howard, Sheldon is characterized as being highly intelligent, but he tends to display childish qualities, such as extreme stubbornness and meanness.

It is claimed by Bernadette that the reason Sheldon is sometimes mean is because the part of his brain that tells him it is wrong to be mean is "getting a wedgie from the rest of his brain".

However, in season 8's "The Space Probe Disintegration", Sheldon tearfully admits to Leonard that he is aware of how his behavior comes across.

The first four episodes of The Big Bang Theory portray Sheldon slightly inconsistently with respect to his later characterization, in which he is depicted as rather witty and sarcastic, and slightly flirtatious towards Penny in the pilot episode, in which he and Leonard briefly compete for her attention: according to Prady, the character "began to evolve after episode five or so and became his own thing".

Sheldon frequently states that he possesses an eidetic memory (although his powers of autobiographical recall are more like hyperthymesia) and an IQ of 187, although he claims his IQ cannot be accurately measured by normal tests.

He originally claimed to have a master's degree and two doctoral degrees, but this list has increased.

Sheldon possesses a mastery (and extensive knowledge) of various subjects such as physics, spectroscopy, radiology, chemistry, pharmacology, both anatomy and physiology, zoology, microbiology, astronomy, cosmology, algebra, geometry, calculus, trigonometry, economics, computers, software engineering, robotics/cybernetics, artificial intelligence, nanotechnology, history, anthropology, geography, linguistics, cryptography, forensics, and railroad engineering (he is a well-known railfan and a fancier of model trains), and in addition to being fluent in Klingon, has some knowledge of Swedish, Finnish, Mandarin, and Hindi.

It is also revealed in Young Sheldon that he is proficient in Spanish, although that particular proficiency has apparently decreased by the time of The Big Bang Theory.

He also shows great musical talent, knowing how to play the piano (as does Parsons in real life) and the theremin (which Parsons had learned to play in real life) and can sing with perfect pitch.