About:
Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter in The Big Bang Theory.

• Known For
• 
  Bean
  as
  Stingo Wheelie
• 
  I Know What You Did Last Summer
  as
  Max Neurick
• 
  National Lampoon's Christmas Vacation
  as
  Rusty Griswold
• 
  Hancock
  as
  Jeremy
• 
  The Opposite of Sex
  as
  Jason Bock