The comic book character, Jane Foster, first appeared in Journey into Mystery #84 (September 1962), and was created by plotter Stan Lee, scripter Larry Lieber and penciler Jack Kirby.

[5][6] Portman stated that she really wanted to do a big effects film that emphasized character, and getting to do it with Branagh was a new way of approaching it, relative to Star Wars.

I got to read all of these biographies of female scientists like Rosalind Franklin who actually discovered the DNA double helix but didn't get the credit for it.

"[11] Hemsworth's wife Elsa Pataky stood in for Portman during the post-credits kissing scene due to a scheduling conflict.

[18] Astrophysicist Dr. Jane Foster, her assistant Darcy Lewis, and mentor Dr. Erik Selvig find the Asgardian Thor in New Mexico, where he has landed after being cast out of Asgard.

In London, Foster and Lewis travel to an abandoned factory where portals to another dimension have appeared, disrupting the laws of physics around them.

With Volstagg and Sif stalling Asgardian soldiers and Fandral assisting their escape, Thor, Loki, and Foster head to Svartalfheim.

There, Loki tricks Malekith into drawing the Aether out of Foster, but Thor's attempt to destroy the exposed substance fails.

They learn that Malekith plans to restore the Dark Elves to dominance by unleashing the Aether at the center of the Convergence in Greenwich.

Due to an enchantment Thor unknowingly placed on it years earlier to protect Foster, Mjolnir reforges and bonds itself to her.

However, this turns out to be a trap for Gorr to take Thor's axe, Stormbreaker, in order to open the Bifrost and enter the realm of Eternity, who can grant his wish to destroy all gods.

When Foster senses that Gorr is about to kill Thor, she makes the ultimate sacrifice in joining the battle with Mjolnir to save him.

Thor asks Foster out for a date, however, he is suddenly confronted by an alternate reality version of Ultron in Vision's body, who wields all six Infinity Stones.

"[23] Peter Travers of Rolling Stone stated Natalie Portman "winningly" portrays Jane Foster across Thor: The Dark World.

[24] Peter Bradshaw of The Guardian found that Portman portrayed Foster through The Dark World in a brave, spirited way.

[25] Dutta of /Film found Foster to be mishandled across the Thor film series, writing, "Although Jane has always been a resilient, intelligent person — a brilliant astrophysicist who did some incredible research on the complex Einstein–Rosen Bridge theory — her character was reduced to a damsel in distress in Thor: The Dark World, after which she completely disappeared from the MCU (I wouldn't count the dubious shot of the back of her head in Avengers: Endgame).

"[26] Valerie Complex of Deadline Hollywood referred to the character as a "damsel in distress" prior to Thor: Love and Thunder.

"[28] Paul Chi of Vanity Fair noted that Portman as the Mighty Thor "caused a commotion on social media.

Club gave a positive review of the film and applauded the performance of Portman, complimenting the development of her character across the movie, saying, "Portman delivers the goods as "The Mighty Thor," kicking ass alongside Hemsworth even if her inaptitude for catchphrases offers a solid running joke as she develops her heroic bona fides.

"[31] Debbopriyaa Dutta of /Film found that Love and Thunder manages to empower Foster's character, stated the film succeeds to provide a realistic development of Foster's relationship with Thor, and found the death of the character to be a "good way of closing out Jane's arc within the context of the direction the film decided to march in.

"[26] Lacy Baugher of Den of Geek called Portman "effervescent" as Foster, stating, the film "gives Jane Foster the story she's deserved for the past decade," and praised the development of the character, writing, "She has passed the test and become a true hero, and at long last when it comes to this character.