William Zabka

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 movies Just One of the Guys (1985) and Back to School (1986). Zabka also co-starred on the CBS television series The Equalizer as the son of the title character (1986–89). He also played Jack, Audrey's jock boyfriend, in National 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 film Most, shot on location in the Czech Republic and Poland. Most (aka The Bridge) had its world premiere at the Sundance Film Festival 2003 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 an Academy Award for Most in the Live Action Short Film category.

William Zabka is known for work in acting across film and television. New Release currently presents 34 verified screen credits connected to this profile.

Selected work includes Cobra Kai: Inside the Dojo (2024), More Than Miyagi: The Pat Morita Story (2021), Cobra Kai (2018), John G. Avildsen: King of the Underdogs (2017), Hot Tub Time Machine (2010), Smiley Face (2007), Dark Descent (2002), The Equalizer (1985).

The recorded credits span 1981 to 2025, including 23 movies and 11 TV shows. The filmography below lists available titles, release years and known roles.

This profile is updated as additional verified information becomes available.