Johnny Galecki (Leonard) starred for 6 years on hit TV series "Roseanne" as David, Darlene's sweet and shy boyfriend.
Darlene was played by Sara Gilbert, who now acts as Leslie Winkle, Leonard's occasional girlfriend/hook-up on
"The Big Bang Theory." Galecki also appeared on "Roseanne" alongside series regular Laurie Metcalf (Jackie), who plays Sheldon's mother Mary Cooper on "The Big Bang Theory."
The reason for the cast reunion?
"The Big Bang Theory" creator Chuck Lorre was also writer and producer on "Roseanne."
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Things You Didn't Know About The Big Bang Theory
FanfictionHere are some mind-blowing facts that you probably didn't know about The Big Bang Theory.
