Sadie Sink, who is now gearing up for the release of the much-anticipated fifth and last season of Stranger Things, is reported to have joined the cast of Avengers: Secret Wars. According to Screen Rant, Sink will appear in the next Avengers project, which is set to begin filming in London next year, though further details have not yet been revealed. This news has prompted a ton of reactions from fans on X (formerly Twitter), with one user joking that Sink's addition will once again shrink Hawkeye's screen time, played by Jeremy Renner. The fan wrote:"Sadie Sink joining the Avengers?Hawkeye just felt his screen time shrink again."Sadie Sink, who has been playing Max Mayfield since 2017 in the Netflix hit series Stranger Things, has also been announced for the West End production of Romeo & Juliet. According to The Hollywood Reporter, the Tony Award-nomimated actress will star opposite actor Noah Jupe in the production, that is scheduled to run for three months, from March 16 to June 6, 2026.More about Sadie Sink joining the next Avengers movie, as fans react in excitement about the newsSadie Sink has technically aldready stepped into the Marvel Cinematic Universe after she was announced as part of the cast for Spider-Man: Brand New Day, earlier this year in May. According to The Hollywood Reporter, Sink's exact character has not yet been disclosed, but she will join the ensemble cast of the fourth Spider-Man movie, directed by Destin Daniel Cretton, alongside Tom Holland, Zendaya, Jacob Batalon, and others.Sadie Sink was also recently spotted at the O2 Arena, where Lorde was performing as part of her Ultrasound World tour. According to Billboard, on Sunday, November 16, the Annie actress appeared onstage with Lorde, and the two performed her hit track "Green Light."This latest update about Sadie reportedly joining the cast of Avengers: Secret Wars has fans buzzing online, with many speculating about what role she could potentially play. This fan wrote:"Perfect casting as Jean Grey imo."Another added:"she’s definitely playing firestar who is an x-man and avenger in the comics."This fan tweeted:"Marvel cooking again.""Interesting move if it’s true. She’s got the range for bigger roles, just hope Marvel gives her something with real depth instead of another throwaway character." added another.The first volume of Stranger Things season five is set to premiere later this month, on November 26.