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Harold Diamond

Acting
Updated: Apr 10, 2026
9Total Films
7.8 Highest Rated

About Harold Diamond

Best known to movie fans as John Rambo's "stick-fighting" opponent in Rambo III, Harold Diamond in reality is one of Florida's most-famous pioneers in the sport of American Kickboxing. Born Harold Roth, he earned the nickname, "Nature Boy", for his long pony-tail, and a habit of wearing blue-jeans into the kick-boxing ring. In the mid-1970s, he became the first martial artist to compete in a kick-boxing match on Miami Beach. Fighting at the Miami Beach Convention Center on South Beach (The same center where Muhammad Ali defeated Sonny Liston for the World's Heavyweight Boxing Title), Roth ran up an impressive undefeated streak all by knockouts. He was "labeled" unbeatable, as he knocked out opponents throughout Miami-Dade and Broward Counties. In 1983 he won a Muay-Thai Championship and soon after retired with an undefeated record of 17-0 with 17 knockouts. His legendary local-fame lead to a Hollywood contract, and a name change to Harold Diamond. But, to south Florida fans, he will always be "Nature Boy" Harold Roth, the greatest kick boxer in the state's history.

Harold Diamond Movies & Career Overview

The filmography of Harold Diamond reflects a career marked by diverse experimentation. Across 9 major appearances, the actor has built a reputation through performances in multiple genres and storytelling styles.

Dominant Genre

A large portion of Harold Diamond's work falls within the Action genre, where audiences tend to respond most strongly to their on-screen presence.

Success Ratio

Approximately 11% of Harold Diamond's films maintain ratings above 6.5, indicating a consistent level of audience approval.

One of the most highly rated entries in their career remains Trained To Kill, which stands out as a key performance.

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Best Harold Diamond Movies Ranked

Must-watch hits from Harold Diamond's career based on audience ratings.

Full Filmography

Every movie Harold Diamond has appeared in, with audience ratings and verdicts.

YearMovieCharacterSuccessMore
2017 King Arthur and the Knights of the Round Table Merlin Flop Similar →
1990 Gypsy Montana the Gypsy Flop Similar →
1989 Trained To Kill Loc Syn Super Hit Similar →
1988 Killing American Style John Morgan Flop Similar →
1988 Spellbinder Man Average Similar →
1988 Rambo III Stick Fighter Average Similar →
1988 Picasso Trigger Jade Flop Similar →
1987 Hard Ticket to Hawaii Jade Flop Similar →
1986 Can You Feel Me Dancing? Judo Instructor Average Similar →

Harold Diamond - Frequently Asked Questions

What is the best movie of Harold Diamond?

According to audience ratings, the best movie starring Harold Diamond is "Trained To Kill" with a rating of 7.8/10.

How many movies has Harold Diamond acted in?

Harold Diamond has been featured in at least 9 major films throughout their career.

What are some other popular movies by Harold Diamond?

Other notable films include "Rambo III", "Can You Feel Me Dancing?", and "Spellbinder".

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