NOW: Galecki's career is hotter than ever as he stars in the hit sitcom, "The Big Bang Theory." The 40-year-old actor is also known for his role as Darlene Conner's boyfriend David on "Roseanne." He is set to star in the third film of the "Ring" series in 2016. —XFINITY Entertainment Staff (Photo by David Becker/Getty Images)
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