Siggy Manheim

Sigfriend "Siggy" Mannheim is the main antagonist of Brian Henson's TV film "Jack and the Beanstalk: the Real Story". He is the man who manages the business affairs of the main character, Jack Robinson (the descendant of the Jack from the original fairy tale), and he encourages him to care only about his business and never get married so that Siggy would inherit the company after Jack died. He keeps the stolen Singing Harp and Goose that Lays the Golden Eggs all to himself. He is portrayed by Jon Voight.

At the end of the film, while he attempts to kill the deceased kindly giant Thunderdell's adoptive daughter, Ondine, and Jack, the other giants frighten him away.