john mark galecki played leonard in the big bang theory.
john mark galecki played leonard in the big bang theory.
who played leonard in the big bang theory?
john mark galecki
johnny galecki









































john mark galecki (born april 30, 1975) is an american actor. he played leonard hofstadter in the cbs sitcom "the big bang theory" (2007–2019) and david healy in the abc sitcom "roseanne" (1992–1997; 2018). 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).
johnny galecki
galecki played leonard hofstadter in the cbs sitcom "the big bang theory", which debuted september 24, 2007. he was originally asked to play the role of sheldon cooper, but he said he was better suited for the role of leonard hofstadter, and sheldon's role was eventually given to jim parsons. during his role as david healy on roseanne, sara gilbert played his longtime girlfriend and later wife, darlene conner. she has appeared as leslie winkle, a colleague in the big bang theory. laurie metcalf, who portrayed roseanne's sister jackie harris, has appeared as mary cooper, mother of leonard's roommate, sheldon. galecki is a cellist, a talent which has been used on the show. as of august 2013, galecki and his "big bang" co-stars kaley cuoco and jim parsons each earned us$325,000 per episode. as of august 2014, the three co-stars earned us$1 million per episode. the series ended on may 16th 2019.
johnny galecki