Johnny Galecki was born in 1975 in Bree, Belgium. Since 1980s he is known both to lovers of TV and cinema. He is best known for his role as David Healy in TV series "Roseanne" (1991-1997). His other well-known appearance include Russell Griswold in "National Lampoon's Christmas Vacation" (1989), Max Neurick in "I Know What You Did Last Summer" (1997), Jason Bock in "The Opposite of Sex" (1998), and Peter Brown in "Vanilla Sky" (2001).