Tom Holland’s Spider-Man 4 has finally begun its casting process. The Marvel Cinematic Universe movie will go into production later this year, with Holland’s Peter Parker the only confirmed character to be back for Spider-Man 4‘s mystery story. Zendaya’s MJ is reportedly set to have a minor role in the upcoming MCU film, though Marvel has yet to comment on that claim. After months of little updates on the status of the next Spider-Man film, Holland’s fourth MCU solo entry as Spider-Man has now received a major piece of casting news.

According to ᴅᴇᴀᴅline, Stranger Things star Sadie Sink has joined Spider-Man 4 in an undisclosed role. The report suggests the leading theory about who she could be playing is a member of the X-Men, Jean Grey. However, it also claims that “another beloved redheaded Spider-Man character” should not be discarded. That nod is clearly related to Mary Jane Watson, Peter Parker’s most famous love interest in Marvel Comics. Since Zendaya’s MJ took over the character’s role and nickname in the MCU’s Spider-Man movies, Sink’s Spider-Man 4 role could end up being a shocking move from Marvel and Sony.

What Sadie Sink’s Spider-Man 4 Casting Means

The Actress Could Completely Change The MCU

The timing of Sink’s casting is certainly intriguing. In December 2024, Sink was reported as the frontrunner for the MCU’s Jean Grey. At the time, there was no project mentioned as to where the X-Men character could make her debut in the franchise, but the latest Spider-Man 4 news makes the situation interesting. The new Spider-Man movie report mentioned that the main theory is that Sink is playing Jean Grey, as was previously reported. At 22, the Stranger Things actress could stay in the MCU for more than a decade, which fits Marvel’s likely approach for the X-Men.

When it comes to Mary Jane Watson, another character teased by the report, things start to become more complicated. Zendaya’s MJ, while completely different from Mary Jane personality-wise, filled the character’s role in the MCU. She is even called “MJ,” the MCU’s nod to Peter Parker’s biggest love interest in the comics. That said, Sink’s performance as Max Mayfield in Stranger Things shows she has the kind of confident atтιтude Mary Jane is known for. Black Cat had also been previously rumored for Spider-Man 4, and Sink has played characters comfortable with danger before to make Felicia Hardy exciting.

Our Take On Sadie Sink’s Spider-Man 4 Casting

The Multiverse Rumors Might Be True After All

Based on how Sink was previously reported to be in line to play the MCU’s Jean Grey and how she is perfect for that whole in terms of looking exactly like her and having the skills to make Jean pop, I believe that her Spider-Man 4 role will end up being the X-Men member. That creates many questions related to why Jean would be in the film. Since Tom Holland’s next Spider-Man movie is set between Avengers: Doomsday and Secret Wars, it is possible that some X-Men members will appear in all three films, making Spider-Man 4 a multiverse story.

All Announced Upcoming MCU Movies

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  Thunderbolts*

  Release Date

  
  May 2, 2025
  

  
  
  
  

  
  

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  The Fantastic Four: First Steps

  Release Date

  
  July 25, 2025
  

  
  
  
  

  
  

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  Avengers: Doomsday (2026)

  
  
  
  
  

  
  

  
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  MCU Spider-Man 4

  Release Date

  
  July 24, 2026
  

  
  
  
  

  
  

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  Avengers: Secret Wars

  Release Date

  
  May 7, 2027
  

  
  
  
  

  
  

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Source: ᴅᴇᴀᴅline