johnny galecki first appeared on roseanne in episode 86.
johnny galecki first appeared on roseanne in episode 86.
which episode did johnny galecki first appear on roseanne?
86
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list of american former child actors
johnny galecki









































john mark galecki (born april 30, 1975) is an american actor. he played leonard hofstadter in the cbs sitcom "the big bang theory" (2007–2019) and david healy in the abc sitcom "roseanne" (1992–1997; 2018). galecki also appeared in the films "national lampoon's christmas vacation" (1989), "prancer" (1989), "suicide kings" (1997), "i know what you did last summer" (1997), "bookies" (2003), "in time" (2011), and "rings" (2017).
johnny galecki