While traveling to meet with the Hessian King, the famed Brothers Grimm, Jacob and Wilhelm, travel through an enchanted forest where they find themselves trapped in the world of their fairy tales.
Unfortunately the movie Once Upon a Brothers Grimm is not yet available on HBO Max.
| Writing | Jacob Grimm | Characters |
| Writing | Wilhelm Grimm | Characters |
| Production | Bernard Rothman | Producer |
| Production | Michael B. Seligman | Associate Producer |
| Production | Jack Wohl | Producer |
| Sound | Mitch Leigh | Songs |
| Writing | Sammy Cahn | Lyricist |
| Editing | Jerry Greene | Editor |
| Production | Gus Schirmer | Casting |
| Art | Ken Johnson | Art Direction |
| Art | Robert Checchi | Set Decoration |
| Costume & Make-Up | Bill Hargate | Costume Design |
| Costume & Make-Up | Larry Abbott | Makeup Artist |
| Costume & Make-Up | Tommy Cole | Makeup Artist |
| Costume & Make-Up | Gail Rowell-Ryan | Hairstylist |
| Costume & Make-Up | Brenda Walters | Hairstylist |
| Costume & Make-Up | Michael Westmore | Makeup Artist |
| Art | Chip Wickett | Assistant Art Director |
| Sound | Larry Stephens | Sound |
| Crew | Dan Andersen | Special Effects |
| Camera | Sam Drummy | Camera Operator |
| Lighting | Carl Gibson | Lighting Director |
| Camera | Bob Keys | Camera Operator |
| Camera | Dave Levisohn | Camera Operator |
| Camera | Dean Terrell | Camera Operator |
| Costume & Make-Up | Sanford Slepak | Assistant Costume Designer |
| Sound | Russ Freeman | Music Coordinator |
| Sound | Jerry Toth | Music Director |
| Crew | Ron Field | Choreographer |
| Directing | Norman Campbell | Director |
| Writing | Jean Holloway | Screenplay |
