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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.

Karate Kid: Legends
as Johnny Lawrence

The Cobra Kai Movie
as William Zabka

Jake Paul vs. Mike Tyson
as Self

Cobra Kai: Inside the Dojo
as Self
Beyond the Bonsai

More Than Miyagi: The Pat Morita Story
as Self

The Netflix Afterparty
as Self

Reunited Apart
as Self

Cobra Kai
as Johnny Lawrence

John G. Avildsen: King of the Underdogs
as Self

The Man in the Silo
as Kevin

The Dog Who Saved Summer
as Officer Johnny/Apollo

I Hate Christian Laettner
as Johnny Lawrence (archive footage)

Where Hope Grows
as Milton Malcolm

The Tonight Show Starring Jimmy Fallon
as Self

Cross
as Saw

Hot Tub Time Machine
as Rick

Smiley Face
as Prison Guard

Cake: A Wedding Story
as Sam

Sweep the Leg
as Johnny Lawrence/Hilmself

Psych
as Coach Baggs

How I Met Your Mother
as William Zabka
The Way of The Karate Kid
as Self / Johnny

Wild Roomies
as Slick Salesman

Antibody
as Otto Emmerick

Dark Descent
as Marty

Python 2
as Greg Larson

Ablaze
as Curt Peters

Landspeed
as Bob Bailey

Hyper Sonic
as The Executive

Gale Force
as Rance

Epoch
as Rover Driver Joe

Falcon Down
as John - Security Guard

Project: Human Weapon
as Rojack

Python
as Greg Larsen

Interceptors
as Dave

High Voltage
as Bulldog

To the Ends of Time
as Alexander

Shootfighter II
as Ruben

The Power Within
as Raymond Vonn

Unlawful Passage
as Howie

Shootfighter: Fight to the Death
as Ruben

MTV Movie & TV Awards
as Self - Presenter

Protect and Surf
as Russell Cooper

A Tiger's Tale
as Randy

Dreams of Gold: The Mel Fisher Story
as Kim Fisher

The Karate Kid Part II
as Johnny Lawrence

Back to School
as Chas

The Equalizer
as Scott McCall

National Lampoon's European Vacation
as Jack

Just One of the Guys
as Greg
Contract for Life: The S.A.D.D. Story
as Rick Peterson

E/R

The Karate Kid
as Johnny Lawrence