Sadie Sink Joins Spider-Man 4 Filming in Glasgow

Sadie Sink has joined the cast of Spider-Man: Brand New Day, currently filming in Glasgow, Scotland, but her character remains a closely guarded secret, sparking widespread speculation about her role. Rumors suggest she could be portraying key Spider-Man characters such as Mary Jane Watson, Gwen Stacy, or Mayday Parker, with some fans particularly noting her potential as a comic-accurate Mary Jane due to her red hair and prominence. Insider hints imply Sink's role may be pivotal to the storyline, possibly a major spoiler if revealed prematurely. The film will also feature Mark Ruffalo as Bruce Banner/The Hulk, Jon Bernthal as Frank Castle/The Punisher, Zendaya reprising her role as MJ, and possibly Joe Keery as Harry Osborn, adding to the expanding cast. The production is expected to wrap up its Glasgow shoot soon before moving to a new location, with the movie's release scheduled for July 31, 2026. Directed by Destin Daniel Cretton and written by Chris McKenna and Erik Sommers, Brand New Day is part of the MCU's Multiverse Saga, promising to introduce significant new characters and plotlines.