johnny galecki first appeared on roseanne in january 21, 1992.
johnny galecki first appeared on roseanne in january 21, 1992.
which episode did johnny galecki first appear on roseanne?
january 21, 1992
bullet::::- buddy foster (born 1957)









































bullet::::- jodie foster (born 1962)









































bullet::::- megan fox (born 1986)









































bullet::::- jaimee foxworth (born 1979)









































bullet::::- griffin frazen (born 1987)









































bullet::::- sarah freeman (born 1986)









































bullet::::- will friedle (born 1976)









































bullet::::- sean frye (born 1966)









































bullet::::- soleil moon frye (born 1976)









































bullet::::- annette funicello (1942–2013)









































bullet::::- isabelle fuhrman (born 1997)









































bullet::::- edward furlong (born 1977)









































bullet::::- nika futterman (born 1969)









































section::::g.









































bullet::::- ariel gade (born 1997)









































bullet::::- johnny galecki (born 1975)









































bullet::::- david gallagher (born 1985)









































bullet::::- mason gamble (born 1986)









































bullet::::- nathan gamble (born 1998)









































bullet::::- luis armand garcia (born 1992)
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