Stig Gunnar Andersson-Tvilling (15 July, 1928, in Bromma - 20 September 1989) was a Swedish ice hockey player who represented his country at the 1952 Winter Olympics in Oslo and the 1956 Winter Olympics in Cortina d'Ampezzo, winning the bronze medal in the 1952 competition and finishing fourth in 1956 alongside his twin brother Hans Andersson-Tvilling. He was born on 15 July 1928 and died on 20 September 1989 in Stockholm. He played his club hockey for Djurgårdens IF Hockey.