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Johnny Galecki

Born
John Mark Galecki , Bree, Belgium
Birthday
1975-04-30
Occupation
Actor
Spouse(s)
Years Active
1987–present
Biography
John Mark "Johnny" Galecki (born April 30, 1975) is a Belgian-born American actor. He is best known for his roles as David Healy in the sitcom Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter, Ph.D, in the CBS sitcom The Big Bang Theory.
Filmography 
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