Jane Foster is a fictional character appearing in American comic books published by Marvel Comics, most commonly depicted as a supporting character of the superhero Thor Odinson. Created by writers Stan Lee and Larry Lieber, and artist Jack Kirby, the character first appeared in Journey into Mystery #84 (Sept. 1962). For many years, Foster was a nurse employed by Dr. Donald Blake, Thor’s first mortal host, before becoming a doctor herself. In a 2014 storyline Foster is revealed to be deemed worthy to wield Thor’s hammer Mjolnir when the former is no longer able. During this temporary period, she adopts the name Thor, the Goddess of Thunder, and joins the Avengers. This storyline ends with the character sacrificing her life to defeat a dangerous adversary, and the reverting of the mantle Thor to its original bearer.
Jane Foster has also appeared in various media adaptations of Thor, including the 2011 feature film Thor and the 2013 sequel Thor: The Dark World, in which she is portrayed by Natalie Portman. She is also referenced with photos or in dialogue in The Avengers (2012), Avengers: Age of Ultron (2015), Thor: Ragnarok (2017), and episodes of the television series Marvel’s Agents of S.H.I.E.L.D.. (From Wikipedia)