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Sadie Sink Says Fan Theories Tipped Her Off to Spider-Man: Brand New Day Casting

Her Tonight Show anecdote highlights Marvel’s tight secrecy around her still‑undisclosed character.

Overview

  • Sink told Jimmy Fallon she saw online rumors linking her to the film two days before Marvel contacted her to join the cast.
  • She confirmed she cannot reveal which character she plays, noting the speculation has been constant and that “there’s sometimes some truth” to fan theories.
  • Spider-Man: Brand New Day wrapped principal photography in mid-December 2025 and is in post-production for a July 31, 2026 theatrical release.
  • Tom Holland returns alongside Zendaya, with Jon Bernthal, Mark Ruffalo, Michael Mando, Jacob Batalon, Liza Colón-Zayas, Marvin Jones III, and Sadie Sink among the confirmed cast.
  • Industry chatter continues over her role—with guesses ranging from Jean Grey to other possibilities—and some trades report she could also appear in 2027’s Avengers: Secret Wars, which remains unconfirmed.