Johnny Galecki

WATCH: Johnny Galecki Returns to the Conner Household in Just Released 'Roseanne' Trailer

Big Bang Theory star, Johnny Galecki , is reprising his role as David Healy in the revival of Roseanne. We don't know much about David's relationship with Darlene (Sara Gilbert), but in today's clip, we see the pair in the Conner household.
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