Johnny Galecki

John Mark Galecki, born on April 30, 1975, is an American actor known for his role as Leonard Hofstadter in the CBS sitcom The Big Bang Theory (2007–2019). He also portrayed David Healy in the ABC sitcoms Roseanne (1992–1997; 2018) and The Conners (2018–2019). Galecki has appeared in movies such as Prancer (1989), National Lampoon's Christmas Vacation (1989), Suicide Kings (1997), I Know What You Did Last Summer (1997), Bookies (2003), In Time (2011), and Rings (2017). He was among the highest paid television actors globally, earning approximately $900,000 per episode for The Big Bang Theory from 2017 to 2019. Galecki has Polish, Irish, and Italian ancestry and was born in Bree, Limburg, Belgium to American parents.