Johnny Galecki

John Mark Galecki is an American actor. In television, he played Leonard Hofstadter on The Big Bang Theory (2007–2019) and David Healy in Roseanne and The Conners (2018–2019). Gal…

Filmography

A Dog's Journey (2019) · as Henry Montgomery
Rings (2017) · as Gabriel Brown
In Time (2011) · as Borel
Hancock (2008) · as Jeremy
Chrystal (2004) · as Barry
Bookies (2003) · as Jude
The Opposite of Sex (1998) · as Jason Bock
I Know What You Did Last Summer (1997) · as Max Neurick
Sudden Fury (1993) · as Daniel Hannigan
National Lampoon's Christmas Vacation (1989) · as Rusty Griswold
Prancer (1989) · as Billy Quinn
A Night in the Life of Jimmy Reardon (1988) · as Toby Reardon