Jane Foster is a superhero appearing in American comic books published by Marvel Comics. The character was introduced as a love interest of the superhero Thor until becoming a superhero in her own right. Foster is later revealed to be deemed worthy to wield Thor's hammer Mjolnir when the former is no longer able. During this period, she adopts the mantle of Thor, and joins the Avengers. Foster's stint as Thor ends with the character sacrificing her life and the mantle reverting to the original Thor. Jane Foster has been described as one of Marvel's most notable and powerful female heroes.