William Michael "Billy" Zabka (born October 20, 1965) is an American actor, martial artist, screenwriter, and film producer. Zabka is best known for his role of Johnny Lawrence in The Karate Kid (1984), The Karate Kid Part II (1986), and decades later reprises the role of Johnny in the Netflix series Cobra Kai (2018-), along with Ralph Macchio as Daniel.During the 1980s, Zabka appeared in the comedy moviesJust One of the Guys(1985) andBack to School(1986). Zabka also co-starred on the CBS television seriesThe Equalizeras the son of the title character (1986–89). He also played Jack, Audrey's jock boyfriend, inNational Lampoon's European Vacation(1985).During the 1990s and 2000s, he acted Mostly in independent films while studying to be a filmmaker. In 2003, he wrote and produced the short filmMost, shot on location in theCzech RepublicandPoland.Most(akaThe Bridge) had its world premiere at theSundance Film Festival2003 and won numerous awards at prestigious film festivals, including Best of Festival at the Palm Springs International Festival of Short Films in 2003. In 2004, he was nominated for anAcademy AwardforMostin the Live Action Short Film category.