Johnny Galecki Quotes
We can't really do any improv on 'The Big Bang' because we don't understand a lot of what the dialogue means to begin with, because of the physics jargon.
Radloff, Jessica. The Big Bang Theory: The Definitive, Inside Story of the Epic Hit Series. Grand Central Publishing, 2022.
John Mark Galecki is an American actor. He played Leonard Hofstadter in the CBS sitcom The Big Bang Theory (2007–2019) for which he received a Primetime Emmy Award nomination, and David Healy in the ABC sitcoms Roseanne (1992–1997; 2018) and The Conners (2018–present). Galecki also appeared in the films National Lampoon's Christmas Vacation (1989), Prancer (1989), Suicide Kings (1997), I Know What You Did Last Summer (1997), Bookies (2003), In Time (2011), and Rings (2017).