Queen Guinevere (also called Gwen by her husband) is a supporting character in the 2011-2018 television series, Once Upon a Time. She was under her husband's spell when he used dust from Avalon to enchant her. She is portrayed by guest stars Joana Metrass and Dalila Bela.
Guinevere is based on the character of the same name from the Arthurian legend.