Johnny Galecki is an American actor. He rose to fame as David Healy on ABC's Roseanne (1992-1997). Galecki reprised the role on the Roseanne revival (2018) and its spinoff The Conners (2018-2019).

Johnny Galecki, known for his role as Leonard in the acclaimed series The Big Bang Theory, has recently expressed his deep admiration for his former co-star and ex-girlfriend Kaley Cuoco.

The Big Bang Theory is hailed by many as the greatest sitcom of all time. The series premiered in late 2007 and aired until its conclusion in May 2019 after 12 seasons on CBS, bringing fans the ...