page_title: Johnny Galecki
hierarchical_section_title: Johnny Galecki
caption_attribution_description: American actor Johnny Galecki at the Ford and project7ten Sustainable/Green Home opening party. Photo released by the Ford Motor Company.
context_page_description: John Mark "Johnny" Galecki is an Belgian-born American actor. Galecki is best known for playing the role of David Healy on Roseanne and Leonard Hofstadter on The Big Bang Theory.
context_section_description: John Mark "Johnny" Galecki (born April 30, 1975) is an Belgian-born American actor. Galecki is best known for playing the role of David Healy on Roseanne and Leonard Hofstadter on The Big Bang Theory.
caption: Johnny Galecki, 2007
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