Roger Sweet, a toy designer known for creating He-Man for the Mattel He-Man and the Masters of the Universe line, has died. He passed away at age 91 after a long battle with dementia. Sweet died peacefully at his care facility Tuesday morning, wife Marlene said.
Most of the headlines about Sweet will be from his time with He-Man. And understandably so. But his work goes far beyond that toy line.
Prior to Mattel
Prior to Mattel, Sweet worked in the industrial design business, first as a designer at Walter Dorwin Teague Associates and later on their in-house team. He worked on an impressive list of accounts for Boeing, Rubbermaid, Hoover and Procter & Gamble. He even worked on the interior of the Boeing 747 jumbo jet, the original packaging for Downy fabric softener and Scope mouthwash. These were no small highlights. The 747 was launched in 1969 and changed the face of commercial flight. Downy and Scope were household names found on millions of American dinner tables.
History with Mattel
Sweet began at Mattel in 1972 as a toy designer, handling small motorized toys. He became one of the lead designers in Mattel’s Preliminary Design Department during the 1970s and 80s. That did not, however, limit his design eye to He-Man. Sweet also helped design the Barbie line, working on various doll accessories for the doll during his time.
The He-Man idea was born from an unglamorous business necessity. In 1976, Mattel’s CEO Ray Wagner turned down the opportunity to produce action figures of the new blockbuster Star Wars. When that success made Star Wars action figures synonymous with the film, Mattel rushed out several in an attempt to compete. None of their lines took off. Sweet comes up with gadgets of his own. Roger Sweet, in his 2005 book Mastering the Universe, claims that he is the creator of He-Man. He cites early work that developed the character’s bulging physique, action pose and swivel-action waist.
In its heyday in 1986, the line Masters of the Universe sold $400 million in U.S. sales alone. Over six years the line sold $1.2 billion worldwide and generated both a syndicated cartoon show and a major motion picture. Roger Sweet’s book, Mastering the Universe: He-Man and the Rise and Fall of a Billion-Dollar Idea, was published in 2005. It remains one of the most comprehensive and firsthand accounts of toy industry innovation and corporate insiders.
Underappreciated
Like many creators, Sweet never got to see much of the money from He-Man’s success. Marlene Sweet launched a GoFundMe to help cover his dementia care fees. This occurred a few months after the trailer for a $200 million Amazon-backed reboot leaked in February 2026. Mattel contributed $5,000, while the fundraiser eventually raised more than $93,000, exceeding its $50,000 goal.
Sweet’s death comes as a new live-action Masters of the Universe movie from Amazon MGM Studios and Mattel is premiering this summer. Marlene has stated that she’s been trying to reach out to the movie’s producers, hoping they will dedicate the film to her husband. “I am having no luck in my goal to reach the producers of the forthcoming He-Man and Masters movie, which is due out June 5,” she wrote on the GoFundMe page in March.
Sweet grew up in Akron, Ohio and graduated from Miami University in Oxford, Ohio and the Institute of Design in Chicago. He is survived by his wife, Marlene.
