Johnny Galecki rose to fame with roles in Roseanne, The Big Bang Theory and more — but he has since stepped back from acting. After appearing in theater productions as a child, Galecki made... 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. The Big Bang Theory's Johnny Galecki has experienced the tragic parts of life, including heartbreak, health scares, and losing his home. Filmography & biography of Johnny Galecki who started his career with the movie Prancer. Check out the movie list, birth date, latest news, videos & photos, trivia gossips and upcoming film projects of actor Johnny Galecki on BookMyShow .
