Belgian born actor Johnny Galecki is worth an estimated $7 million as of 2012. The TV actor got his first acting role in the 1987 miniseries on CBS titled "Murder Ordained." He also got to play Chevy Chase's son Rusty in "Christmas Vacation" before landing one of the roles he is most known for, David Healy on hit TV show Roseanne, where he played the role of Roseanne's daughter's boyfriend. After Roseanne went off the air, Galecki back to acting in movies. He acted opposite Christopher Walken in "Suicide Kings," he was in the slasher movie "I Know What You Did Last Summer," "Vanilla Sky," and Hancock with Will Smith. He returned to Television, and played guest roles on shows, most notably "My Name Is Earl," and "Norm." His most recognizable role today is as theoretical physicist Dr. Leonard Hofstadter in "The Big Bang Theory," one of the highest rated shows on TV, his work on the show has been nominated for both Emmy and Golden Globe awards.

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