The Big Bang Theory/Leonard Hofstadter

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Dr. Leonard Leakey Hofstadter
The Big Bang Theory
TBBT-Leonard Hofstadter.jpg
Actor Johnny Galecki
First Appearance 1x01 - Pilot
Series Billing Main cast
Episode Count All episodes
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Dr. Leonard Leakey Hofstadter is one of the main characters in the sitcom The Big Bang Theory. He is portrayed by Johnny Galecki.


Basic Information

Character History

Memorable Moments


  • Leonard wants to win a Nobel prize someday.
  • Leonard has a grandmother with Alzheimer's
  • Leonard wears boxer shorts.
  • Leonard cannot process corn and is lactose intolerant.
  • Leonard is a huge Superman fan, so much so that he owns all the Superman films and more than 2600 Superman comics.
  • Leonard does not get along well with his mother, psychiatrist and neuroscientist Dr. Beverly Hofstadter, because he had a difficult childhood due to her cold, impersonal, distant, over-analytical and un-nurturing personality. While he was young, he even ended up building a hugging machine to compensate for the lack of affection from Beverly.