John AvildsenRegissör
Ralph MacchioDaniel LaRusso
Pat MoritaMr. Kesuke Miyagi
Elisabeth ShueAli Mills
Randee HellerLucille Larusso
Martin KoveJohn Kreese
William ZabkaJohnny Lawrence
Chad McQueenDutch
Tony O'DellJimmy
Ron ThomasBobby
Rob GarrisonTommy
Israel JuarbeFreddy Fernandez
William BassettMr. Mills
Larry ScottJerry
Juli FieldsSusan
Dana AndersenBarbara
Frank AvalonChucky
Jeff FishmanBilly
Ken DalyChris
Tom FridleyAlan
Pat JohnsonReferee
Bruce MalmuthRing announcer
Darryl VidalKarate semi-finalist
Frances BayLady with dog
Christopher KriesaOfficial
Bernard KubyMr. Harris
Joan LemmoRestaurant manager
Helen SiffCashier
Larry DrakeYahoo 1
David AbbottYahoo 2
Molly BaslerCheerleading coach
Brian DavisBoy in bathroom
David De LangeWaiter
Erik FelixKarate student
Peter JasonSoccer Coach
Todd LookinlandChicken Boy
Clarence McGee Jr.Referee 2
William NorrenDoctor
Sam ScarberReferee 3
Scott StraderEddie