Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, ...

WGN Radio’s Dave Plier celebrates the 35th anniversary of holiday film classic ‘National Lampoon’s Christmas Vacation with special guests Chevy Chase (Clark Griswold), Beverly D’Angelo (Ellen Griswold ...

Johnny Galecki took on a new acting gig, but it wasn’t for a TV series or movie. Instead, the Emmy-nominated actor reunited with his longtime Big Bang Theory co-star Kaley Cuoco to shoot an ad ...

Johnny Galecki and Kaley Cuoco attend the 24th and final “A Night at Sardi’s” to benefit the Alzheimer’s Association at The Beverly Hilton Hotel on March 9, 2016. Getty Images.

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 his ...