Marie Teresa Ríos, known as Tere Ríos, was an American writer and the author of the 1965 book The Fifteenth Pelican, which was the basis for the 1960s Screen Gems television sitcom The Flying Nun. Ríos was the mother of Humbert Roque Versace, the first U.S. Army prisoner of war in Southeast Asia awarded the Medal of Honor.

The Flying Nun is an American fantasy sitcom television series about a community of nuns which included one who could fly when the wind caught her cornette. It was produced by Screen Gems for ABC based on the 1965 book The Fifteenth Pelican, written by Tere Ríos. Sally Field starred as the title character, Sister Bertrille.