Ruth Marianna Handler was an American businesswoman and inventor. She is best known for inventing the Barbie doll in 1959, and being co-founder of toy manufacturer Mattel with her husband Elliot, as well as serving as the company's first president from 1945 to 1975.

Barbie is a fashion doll created by American businesswoman Ruth Handler, manufactured by American toy and entertainment company Mattel and introduced on March 9, 1959. The toy was based on the German Bild Lilli doll which Handler had purchased while in Europe. The figurehead of an eponymous brand that includes a range of fashion dolls and accessories, Barbie has been an important part of the toy fashion doll market for over six decades. Mattel has sold over a billion Barbie dolls, making it the company's largest and most profitable line. The brand has expanded into a multimedia franchise since 1984, including video games, animated films, television/web series, and a live-action film.