Sadie Sink cast as Mayday Parker in Spider-Man: Brand New Day

Marvel Studios’ Spider-Man: Brand New Day continues to build hype with major casting rumors.

According to Jeff Sneider via The Hot Mic, Sadie Sink is set to play Mayday Parker, a character tied to the multiverse and reportedly the daughter of Tobey Maguire’s Peter Parker and MJ Watson.

The film will reportedly bridge Tom Holland’s MCU Spider-Man with legacy elements from previous universes. Mayday Parker’s inclusion is a multiversal twist connecting to Maguire’s Spider-Man timeline — raising fan theories about cross-generational web-slingers uniting.

Meanwhile, Sarah Snook (Succession, The Beanie Bubble) is rumored to portray a secondary villain. Her character remains under wraps, but a recent Cosmic Circus report teased a “dark, mysterious female” with Japanese shinobi/samurai-inspired armor, hinting at a potentially original or deep-cut Marvel character.

Spider-Man: Brand New Day will follow the events of Avengers: Doomsday, with Peter Parker attempting to lead a normal life before a new threat forces his return to heroism. Destin Daniel Cretton will direct, with a script by Chris McKenna and Erik Sommers. Filming begins August 2025 in the UK, and the film is slated to release July 31, 2026.

The cast includes Tom Holland, Zendaya, Sink, and Liza Colón-Zayas in undisclosed roles. Marvel Studios is also casting two additional villain roles.