Folke Ronnie Wallentin Hellström (21 February 1949 – 6 February 2022) was a Swedish professional footballer who played as a goalkeeper. He represented Hammarby IF and 1. FC Kaiserslautern during a career that spanned between 1966 and 1984. He was considered one of the world's best goalkeepers in the 1970s. In 1988, he played one Allsvenskan game for GIF Sundsvall following an injury crisis. As a full international between 1968 and 1980, he won 77 caps for the Sweden national team and represented his country at the 1970, 1974, and 1978 FIFA World Cups. He was awarded Guldbollen as Sweden's best footballer of the year in both 1971 and 1978.